Dividing Mixed Numbers and Fractions: Dividing a fraction by a mixed fraction

Examples with solutions for Dividing Mixed Numbers and Fractions: Dividing a fraction by a mixed fraction

Exercise #1

35:213= \frac{3}{5}:2\frac{1}{3}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert the mixed number 2132\frac{1}{3} into an improper fraction.
  • Step 2: Take the reciprocal of this improper fraction.
  • Step 3: Multiply 35\frac{3}{5} by this reciprocal.
  • Step 4: Simplify the resulting fraction if needed.

Now, let's work through each step:

Step 1: Convert 2132\frac{1}{3} to an improper fraction.
A mixed number like 2132\frac{1}{3} means 2+132 + \frac{1}{3}. To convert it, multiply the whole number part by the denominator of the fractional part and add the numerator: 2×3+1=6+1=72 \times 3 + 1 = 6 + 1 = 7. Thus, the improper fraction is 73\frac{7}{3}.

Step 2: Find the reciprocal of 73\frac{7}{3}.
The reciprocal of 73\frac{7}{3} is 37\frac{3}{7}.

Step 3: Multiply 35\frac{3}{5} by 37\frac{3}{7}.
When multiplying fractions, multiply numerators and denominators: 35×37=3×35×7=935\frac{3}{5} \times \frac{3}{7} = \frac{3 \times 3}{5 \times 7} = \frac{9}{35}.

Step 4: Simplify 935\frac{9}{35} if necessary.
The fraction 935\frac{9}{35} is already in its simplest form, as 9 and 35 have no common factors other than 1.

Therefore, the solution to the problem is 935\frac{9}{35}.

Answer

935 \frac{9}{35}

Exercise #2

310:212= \frac{3}{10}:2\frac{1}{2}=

Video Solution

Step-by-Step Solution

To solve this division problem, we'll follow these outlined steps:

  • Step 1: Convert the mixed number to an improper fraction.
  • Step 2: Find the reciprocal of the improper fraction.
  • Step 3: Multiply the first fraction by this reciprocal.
  • Step 4: Simplify the result to get the final answer.

Let's go through each step in detail:

Step 1: Convert 212 2\frac{1}{2} to an improper fraction:

212 2\frac{1}{2} is equal to 2+12=42+12=52 2 + \frac{1}{2} = \frac{4}{2} + \frac{1}{2} = \frac{5}{2} .

Step 2: Find the reciprocal of 52 \frac{5}{2} :

The reciprocal of 52 \frac{5}{2} is 25 \frac{2}{5} .

Step 3: Multiply 310 \frac{3}{10} by 25 \frac{2}{5} :

310×25=3×210×5=650 \frac{3}{10} \times \frac{2}{5} = \frac{3 \times 2}{10 \times 5} = \frac{6}{50} .

Step 4: Simplify 650 \frac{6}{50} :

To simplify, we find the greatest common divisor of 6 and 50, which is 2:

650=325 \frac{6}{50} = \frac{3}{25} after dividing the numerator and denominator by 2.

Therefore, the solution to the problem is 325 \frac{3}{25} . This matches choice 2.

Answer

325 \frac{3}{25}

Exercise #3

12:145= \frac{1}{2}:1\frac{4}{5}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Convert the mixed number 1451\frac{4}{5} to an improper fraction.
  • Divide 12\frac{1}{2} by the improper fraction using multiplication by the reciprocal.
  • Simplify the resulting expression.

Now, let's work through each step:
Step 1: Convert the mixed number to an improper fraction.
1451\frac{4}{5}: Multiply 1 by 5 and add 4, resulting in 95\frac{9}{5}.

Step 2: Divide 12\frac{1}{2} by 95\frac{9}{5}.
Use the division of fractions rule by multiplying by the reciprocal: 12×59=1×52×9=518\frac{1}{2} \times \frac{5}{9} = \frac{1 \times 5}{2 \times 9} = \frac{5}{18}.

Therefore, the solution to the problem is 518\frac{5}{18}.

Answer

518 \frac{5}{18}

Exercise #4

35:112= \frac{3}{5}:1\frac{1}{2}=

Video Solution

Step-by-Step Solution

To solve this problem, we will follow the steps below:

  • Step 1: Convert the mixed number to an improper fraction.
  • Step 2: Divide by using multiplication with the reciprocal.
  • Step 3: Simplify the resulting fraction, if necessary.

Step 1: Convert 1121\frac{1}{2} to an improper fraction.
The mixed number 1121\frac{1}{2} is converted by multiplying the whole number 1 by the denominator 2, adding the numerator 1, resulting in 32\frac{3}{2}.

Step 2: Divide by multiplying with the reciprocal.
The division 35÷32\frac{3}{5} \div \frac{3}{2} is performed by multiplying 35\frac{3}{5} with the reciprocal of 32\frac{3}{2}, which is 23\frac{2}{3}.

Thus, we have:

35×23=3×25×3=615\frac{3}{5} \times \frac{2}{3} = \frac{3 \times 2}{5 \times 3} = \frac{6}{15}.

Step 3: Simplify the result.
The fraction 615\frac{6}{15} can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 3:
6÷315÷3=25\frac{6 \div 3}{15 \div 3} = \frac{2}{5}.

Therefore, the final solution to the problem is 25\frac{2}{5}.

Answer

25 \frac{2}{5}

Exercise #5

45:245= \frac{4}{5}:2\frac{4}{5}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll break it down into manageable steps:

  • Step 1: Convert the mixed number 245 2\frac{4}{5} into an improper fraction.
  • Step 2: Divide the fraction 45 \frac{4}{5} by the improper fraction obtained in Step 1.
  • Step 3: Multiply by the reciprocal to perform the division.

Let's work through each step:

Step 1: Convert the mixed number to an improper fraction.
The mixed number 245 2\frac{4}{5} can be converted as follows:

245=2×5+45=10+45=145 2\frac{4}{5} = \frac{2 \times 5 + 4}{5} = \frac{10 + 4}{5} = \frac{14}{5}

Step 2: Change the division into multiplication by using the reciprocal of 145\frac{14}{5}.
The reciprocal of 145\frac{14}{5} is 514\frac{5}{14}.

Step 3: Multiply 45\frac{4}{5} by 514\frac{5}{14}:

45×514=4×55×14 \frac{4}{5} \times \frac{5}{14} = \frac{4 \times 5}{5 \times 14}

Simplify the expression:

=2070 = \frac{20}{70}

Reduce 2070\frac{20}{70} by dividing the numerator and the denominator by their greatest common divisor, which is 10:

=27 = \frac{2}{7}

Therefore, the solution to the problem is 27\boxed{\frac{2}{7}}, which corresponds to choice 2.

Answer

27 \frac{2}{7}

Exercise #6

34:123= \frac{3}{4}:1\frac{2}{3}=

Video Solution

Step-by-Step Solution

To solve the problem 34:123\frac{3}{4}:1\frac{2}{3}, follow these steps:

  • Step 1: Convert the mixed number 1231\frac{2}{3} to an improper fraction.
  • Step 2: Rewrite the division problem using the reciprocal of the divisor.
  • Step 3: Multiply the fractions.

Let’s proceed through each step:

Step 1: Convert the mixed number to an improper fraction.

123=1×3+23=3+23=531\frac{2}{3} = \frac{1 \times 3 + 2}{3} = \frac{3 + 2}{3} = \frac{5}{3}

Step 2: The division 34:53\frac{3}{4} : \frac{5}{3} becomes 34×35\frac{3}{4} \times \frac{3}{5} (multiply by the reciprocal).

Step 3: Multiply the two fractions:

34×35=3×34×5=920\frac{3}{4} \times \frac{3}{5} = \frac{3 \times 3}{4 \times 5} = \frac{9}{20}

Thus, the answer is 920\frac{9}{20}.

The correct answer is choice 3: 920\frac{9}{20}.

Answer

920 \frac{9}{20}

Exercise #7

14:115= \frac{1}{4}:1\frac{1}{5}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert the mixed number 115 1\frac{1}{5} into an improper fraction.
  • Step 2: Divide 14 \frac{1}{4} by the improper fraction using the reciprocal.
  • Step 3: Simplify the resulting fraction.

Now, let's work through each step:

Step 1: Convert the mixed number 115 1\frac{1}{5} into an improper fraction. The integer part is 1 and the fraction part is 15\frac{1}{5}. The improper fraction becomes:

5×1+15=65\frac{5 \times 1 + 1}{5} = \frac{6}{5}

Step 2: Divide 14 \frac{1}{4} by the improper fraction 65\frac{6}{5}. This is equivalent to multiplying 14 \frac{1}{4} by the reciprocal of 65\frac{6}{5}:

14÷65=14×56\frac{1}{4} \div \frac{6}{5} = \frac{1}{4} \times \frac{5}{6}

Perform the multiplication:

1×54×6=524\frac{1 \times 5}{4 \times 6} = \frac{5}{24}

Step 3: The resulting fraction 524\frac{5}{24} is already in its simplest form.

Therefore, the solution to the problem is 524\frac{5}{24}. The correct choice is option 4.

Answer

524 \frac{5}{24}

Exercise #8

37:123= \frac{3}{7}:1\frac{2}{3}=

Video Solution

Step-by-Step Solution

To solve the problem of dividing the fraction 37 \frac{3}{7} by the mixed number 123 1\frac{2}{3} , we'll follow these steps:

  • Step 1: Convert the mixed number 123 1\frac{2}{3} into an improper fraction.
  • Step 2: Find the reciprocal of this improper fraction.
  • Step 3: Multiply the initial fraction by this reciprocal.

Let's proceed with each step:

Step 1: Convert 123 1\frac{2}{3} to an improper fraction:
A mixed number abc a\frac{b}{c} can be converted to an improper fraction by multiplying the whole number part by the denominator and adding the numerator. Hence:
13+2=3+2=5 1 \cdot 3 + 2 = 3 + 2 = 5
This gives us the improper fraction 53 \frac{5}{3} .

Step 2: Find the reciprocal of 53 \frac{5}{3} :
The reciprocal of a fraction ab \frac{a}{b} is ba \frac{b}{a} . Therefore, the reciprocal of 53 \frac{5}{3} is 35 \frac{3}{5} .

Step 3: Multiply 37 \frac{3}{7} by the reciprocal 35 \frac{3}{5} :
37×35=3375 \frac{3}{7} \times \frac{3}{5} = \frac{3 \cdot 3}{7 \cdot 5}
Compute the multiplication:
935 \frac{9}{35}

Therefore, the solution to the problem is 935 \frac{9}{35} .

Answer

935 \frac{9}{35}

Exercise #9

23:134= \frac{2}{3}:1\frac{3}{4}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert the mixed number 1341\frac{3}{4} to an improper fraction.

  • Step 2: Replace the division with multiplication by the reciprocal of the improper fraction.

  • Step 3: Perform the multiplication and simplify if necessary.

Now, let's work through each step:
Step 1: Convert 1341\frac{3}{4} to an improper fraction.
A mixed number abca \frac{b}{c} is converted to an improper fraction ac+bc\frac{ac + b}{c}.
So, 134=1×4+34=741\frac{3}{4} = \frac{1 \times 4 + 3}{4} = \frac{7}{4}.

Step 2: Replace the division with multiplication by the reciprocal of 74\frac{7}{4}.
The reciprocal of 74\frac{7}{4} is 47\frac{4}{7}, so the expression becomes: 23×47\frac{2}{3} \times \frac{4}{7}.

Step 3: Perform the multiplication:
Multiply the numerators: 2×4=82 \times 4 = 8.
Multiply the denominators: 3×7=213 \times 7 = 21.
Thus, the product is 821\frac{8}{21}.

No further simplification is needed as 8 and 21 have no common factors.

Therefore, the solution to the problem is 821 \frac{8}{21} .

Answer

821 \frac{8}{21}

Exercise #10

34:113= \frac{3}{4}:1\frac{1}{3}=

Video Solution

Step-by-Step Solution

To solve this division problem, we will follow these steps:

  • Step 1: Convert the mixed number to an improper fraction.
  • Step 2: Replace division with multiplication by the reciprocal.
  • Step 3: Perform the multiplication and simplify the result.

Let's begin with the solution:

Step 1: Convert the mixed number 113 1\frac{1}{3} into an improper fraction.

To convert, multiply 1 (the whole number) by 3 (the denominator) and add 1 (the numerator):

1×3+1=3+1=4 1 \times 3 + 1 = 3 + 1 = 4

Therefore, 113=43 1\frac{1}{3} = \frac{4}{3} .

Step 2: Write the division problem as multiplication by the reciprocal of 43 \frac{4}{3} .

The reciprocal of 43 \frac{4}{3} is 34 \frac{3}{4} . So,

34÷113=34×34 \frac{3}{4} \div 1\frac{1}{3} = \frac{3}{4} \times \frac{3}{4} .

Step 3: Multiply the fractions and simplify if possible.

Multiply the numerators and the denominators:

Numerators: 3×3=9 \text{Numerators: } 3 \times 3 = 9

Denominators: 4×4=16 \text{Denominators: } 4 \times 4 = 16

Thus, 34×34=916 \frac{3}{4} \times \frac{3}{4} = \frac{9}{16} .

No further simplification is required as 9 and 16 are relatively prime.

Therefore, the solution to the problem is 916 \frac{9}{16} .

Answer

916 \frac{9}{16}

Exercise #11

58:134= \frac{5}{8}:1\frac{3}{4}=

Video Solution

Step-by-Step Solution

To solve the problem, we'll follow these steps:

  • Step 1: Convert the mixed number, 134 1 \frac{3}{4} , into an improper fraction.
  • Step 2: Rewrite the division as a multiplication by the reciprocal of the improper fraction.
  • Step 3: Perform the multiplication and simplify the resulting fraction.

Now, let's work through each step:
Step 1: Convert the mixed number. 134 1 \frac{3}{4} can be converted as follows:

The whole number 11 times the denominator 44 plus the numerator 33 gives 77.
Thus, 134=74 1 \frac{3}{4} = \frac{7}{4} .

Step 2: Divide 58 \frac{5}{8} by 74 \frac{7}{4} by multiplying by its reciprocal:
58÷74=58×47 \frac{5}{8} \div \frac{7}{4} = \frac{5}{8} \times \frac{4}{7} .

Step 3: Multiply across the numerators and the denominators:
5×48×7=2056\frac{5 \times 4}{8 \times 7} = \frac{20}{56}.

Simplify 2056\frac{20}{56} by finding the greatest common divisor (GCD), which is 44:
2056=20÷456÷4=514\frac{20}{56} = \frac{20 \div 4}{56 \div 4} = \frac{5}{14}.

Therefore, the solution to the problem is 514 \frac{5}{14} .

Answer

514 \frac{5}{14}

Exercise #12

78:238= \frac{7}{8}:2\frac{3}{8}=

Video Solution

Step-by-Step Solution

To solve this problem, we will follow these steps:

  • Step 1: Convert the mixed number 238 2\frac{3}{8} into an improper fraction.
  • Step 2: Divide 78 \frac{7}{8} by the improper fraction by multiplying with its reciprocal.
  • Step 3: Simplify the resulting fraction.

Now, let's go through each step:

Step 1: Convert the mixed number 238 2\frac{3}{8} to an improper fraction. We do this by multiplying the whole number part by the denominator and adding the numerator:

238=2×8+38=16+38=198 2\frac{3}{8} = \frac{2 \times 8 + 3}{8} = \frac{16 + 3}{8} = \frac{19}{8} .

Step 2: To divide by a fraction 198 \frac{19}{8} , we multiply by its reciprocal 819 \frac{8}{19} :

78:198=78×819 \frac{7}{8} : \frac{19}{8} = \frac{7}{8} \times \frac{8}{19} .

Step 3: Simplify the resulting expression. Multiply the numerators and the denominators:

7×88×19=56152 \frac{7 \times 8}{8 \times 19} = \frac{56}{152} .

The 8 8 s cancel out, leaving us with:

56152=719 \frac{56}{152} = \frac{7}{19} .

Therefore, the solution to the problem is 719 \frac{7}{19} .

Answer

719 \frac{7}{19}

Exercise #13

56:313= \frac{5}{6}:3\frac{1}{3}=

Video Solution

Step-by-Step Solution

To solve the problem 56:313 \frac{5}{6} : 3\frac{1}{3} , we follow these steps:

  • Step 1: Convert the mixed number to an improper fraction.
  • Step 2: Multiply the dividend by the reciprocal of the improper fraction.
  • Step 3: Simplify the resulting fraction.

Let's carry out these steps:
Step 1: Convert 313 3\frac{1}{3} into an improper fraction. We do this by multiplying the whole number 3 3 by the denominator 3 3 and adding the numerator 1 1 , giving us:

3×3+1=10 3 \times 3 + 1 = 10

This yields the improper fraction 103 \frac{10}{3} .

Step 2: Divide 56 \frac{5}{6} by 103 \frac{10}{3} involves multiplying 56 \frac{5}{6} by the reciprocal of 103 \frac{10}{3} , which is 310 \frac{3}{10} :

56×310=5×36×10=1560 \frac{5}{6} \times \frac{3}{10} = \frac{5 \times 3}{6 \times 10} = \frac{15}{60}

Step 3: Simplify 1560 \frac{15}{60} by dividing both the numerator and denominator by their greatest common divisor, which is 15:

1560=15÷1560÷15=14 \frac{15}{60} = \frac{15 \div 15}{60 \div 15} = \frac{1}{4}

Thus, the solution to 56:313 \frac{5}{6} : 3\frac{1}{3} is 14 \frac{1}{4} .

Answer

14 \frac{1}{4}