Examples with solutions for Division of Fractions: Division by a whole number

Exercise #1

1×12:2 1\times\frac{1}{2}:2

Video Solution

Step-by-Step Solution

According to the rules of the order of operations, we should first solve the exercise from left to right since there are only multiplication and division operations present:

1×12=12 1\times\frac{1}{2}=\frac{1}{2}

12:2=14 \frac{1}{2}:2=\frac{1}{4}

Answer

1/4

Exercise #2

Solve the following exercise:

913:3=? \frac{9}{13}:3=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we'll convert the division of the fraction 913 \frac{9}{13} by the whole number 3 into a multiplication problem. This involves multiplying by the reciprocal of 3.

Step-by-step solution:
Step 1: Rewrite the division problem using the concept of reciprocal:
913:3=913×13 \frac{9}{13} : 3 = \frac{9}{13} \times \frac{1}{3} Step 2: Perform the multiplication of the fractions:
When multiplying fractions, multiply the numerators together and the denominators together:
9×113×3=939 \frac{9 \times 1}{13 \times 3} = \frac{9}{39} Step 3: Simplify the resulting fraction:
To simplify 939\frac{9}{39}, find the greatest common divisor (GCD) of 9 and 39, which is 3:
Divide both the numerator and the denominator by 3:
9÷339÷3=313 \frac{9 \div 3}{39 \div 3} = \frac{3}{13}

Therefore, the solution to the problem is 313 \frac{3}{13} .

Answer

313 \frac{3}{13}

Exercise #3

Solve the following exercise:

35:3=? \frac{3}{5}:3=\text{?}

Video Solution

Step-by-Step Solution

We need to solve the expression 35:3\frac{3}{5} : 3.

The division of a fraction by a whole number can be rewritten as the multiplication of the fraction by the reciprocal of the whole number.

The given problem transforms as follows:

35:3=35×13\frac{3}{5} : 3 = \frac{3}{5} \times \frac{1}{3}

Performing the multiplication, we multiply the numerators together and the denominators together:

3×15×3=315\frac{3 \times 1}{5 \times 3} = \frac{3}{15}

Now, simplify 315\frac{3}{15} by finding their greatest common divisor (GCD), which is 3:

3÷315÷3=15\frac{3 \div 3}{15 \div 3} = \frac{1}{5}

Thus, the answer to the division is 15\frac{1}{5}.

Therefore, the solution to the problem 35:3\frac{3}{5} : 3 is 15\frac{1}{5}, which corresponds to choice 4.

Answer

15 \frac{1}{5}

Exercise #4

Solve the following exercise:

64:2=? \frac{6}{4}:2=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Convert the division into a multiplication problem.
  • Step 2: Simplify the result, if necessary.

Now, let's work through each step:
Step 1: We need to divide 64 \frac{6}{4} by 2. We can represent this as:

64÷2=64×12 \frac{6}{4} \div 2 = \frac{6}{4} \times \frac{1}{2}

This converts the division into a multiplication problem by using the reciprocal of 2, which is 12 \frac{1}{2} .

Step 2: Multiply the fractions:

6×14×2=68 \frac{6 \times 1}{4 \times 2} = \frac{6}{8}

Step 3: Simplify the fraction 68 \frac{6}{8} :
To simplify 68 \frac{6}{8} , divide both the numerator and the denominator by their greatest common divisor, which is 2:

6÷28÷2=34 \frac{6 \div 2}{8 \div 2} = \frac{3}{4}

Therefore, the solution to the problem is 34 \frac{3}{4} .

Answer

34 \frac{3}{4}

Exercise #5

Solve the following exercise:

109:5=? \frac{10}{9}:5=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem 109:5 \frac{10}{9} : 5 , we will convert the division into a multiplication with a reciprocal.

  • Step 1: Recognize that dividing by 5 5 is the same as multiplying by 15 \frac{1}{5} .
  • Step 2: Rewrite the problem as: 109×15 \frac{10}{9} \times \frac{1}{5} .
  • Step 3: Multiply the fractions: 10×19×5=1045\frac{10 \times 1}{9 \times 5} = \frac{10}{45}.
  • Step 4: Simplify the fraction 1045 \frac{10}{45} by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 5.
  • Step 5: 10÷545÷5=29\frac{10 \div 5}{45 \div 5} = \frac{2}{9}.

Therefore, the solution to the problem is 29 \frac{2}{9} .

Answer

29 \frac{2}{9}

Exercise #6

Complete the following exercise:

99:3=? \frac{9}{9}:3=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Simplify the given fraction.
  • Step 2: Convert the division by a whole number into multiplication by its reciprocal.
  • Step 3: Perform the multiplication and simplify if needed.

Now, let's work through each step:
Step 1: Simplify the fraction 99 \frac{9}{9} . Since the numerator and denominator are the same, it simplifies to 1 1 .
Step 2: Convert the division 1÷3 1 \div 3 into multiplication by using the reciprocal: 13 \frac{1}{3} . Therefore, 1÷3 1 \div 3 becomes 1×13 1 \times \frac{1}{3} .
Step 3: Perform the multiplication: 1×13=13 1 \times \frac{1}{3} = \frac{1}{3} .

Therefore, the solution to the problem is 13 \frac{1}{3} , which corresponds to the answer choice 13 \frac{1}{3} .

Answer

13 \frac{1}{3}

Exercise #7

Solve the following exercise:

411:4=? \frac{4}{11}:4=\text{?}

Video Solution

Step-by-Step Solution

To solve the equation 411÷4 \frac{4}{11} \div 4 , let's follow these steps:

  • Step 1: Identify the reciprocal of the divisor 44. The reciprocal of 44 is 14\frac{1}{4}.
  • Step 2: Multiply the original fraction by the reciprocal. Thus, 411×14\frac{4}{11} \times \frac{1}{4}.
  • Step 3: Perform the multiplication. Multiplying two fractions involves multiplying their numerators and their denominators:

411×14=4×111×4=444\frac{4}{11} \times \frac{1}{4} = \frac{4 \times 1}{11 \times 4} = \frac{4}{44}.

Step 4: Simplify the resulting fraction. Notice that 444\frac{4}{44} can be simplified because 4 and 44 share a common factor of 4:

444=111\frac{4}{44} = \frac{1}{11}.

Therefore, the solution to the division problem 411÷4 \frac{4}{11} \div 4 is 111\frac{1}{11}.

Answer

111 \frac{1}{11}

Exercise #8

Solve the following exercise:

89:4=? \frac{8}{9}:4=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of dividing the fraction 89 \frac{8}{9} by the whole number 4, we will follow the reciprocal method.

  • Step 1: Express the whole number 4 as a fraction: 4=41 4 = \frac{4}{1} .
  • Step 2: Find the reciprocal of 41 \frac{4}{1} , which is 14 \frac{1}{4} .
  • Step 3: Multiply the original fraction 89 \frac{8}{9} by 14 \frac{1}{4} :
    89×14=8×19×4=836. \frac{8}{9} \times \frac{1}{4} = \frac{8 \times 1}{9 \times 4} = \frac{8}{36}.
  • Step 4: Simplify the fraction 836 \frac{8}{36} . The greatest common divisor (GCD) of 8 and 36 is 4:
    8÷436÷4=29. \frac{8 \div 4}{36 \div 4} = \frac{2}{9}.

Thus, the result of dividing 89 \frac{8}{9} by 4 is 29 \frac{2}{9} .

Answer

29 \frac{2}{9}

Exercise #9

Solve the following exercise:

67:3=? \frac{6}{7}:3=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of dividing 67 \frac{6}{7} by 3, we follow these steps:

  • Step 1: Understand that dividing by a number is the same as multiplying by its reciprocal.
  • Step 2: Write 3 as a fraction: 3=31 3 = \frac{3}{1} .
  • Step 3: Find the reciprocal of 31 \frac{3}{1} , which is 13 \frac{1}{3} .
  • Step 4: Multiply 67 \frac{6}{7} by 13 \frac{1}{3} .
  • Step 5: Perform the multiplication: 67×13=6×17×3=621 \frac{6}{7} \times \frac{1}{3} = \frac{6 \times 1}{7 \times 3} = \frac{6}{21}
  • Step 6: Simplify 621\frac{6}{21} by finding the greatest common divisor of 6 and 21, which is 3.
  • Step 7: Divide both the numerator and the denominator by 3: 6÷321÷3=27 \frac{6 \div 3}{21 \div 3} = \frac{2}{7}

Thus, the result of the division 67÷3 \frac{6}{7} \div 3 is 27 \frac{2}{7} .

The correct choice from the provided options is 27 \frac{2}{7} , which matches choice number 4.

Answer

27 \frac{2}{7}

Exercise #10

Solve the following exercise:

23:2=? \frac{2}{3}:2=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we need to divide the fraction 23\frac{2}{3} by the whole number 2.

We'll follow these steps:

  • Step 1: Express the division operation with reciprocal multiplication.
  • Step 2: Simplify the expression if possible.

Step 1: To divide 23\frac{2}{3} by 2, we multiply 23\frac{2}{3} by the reciprocal of 2. The reciprocal of 2 is 12\frac{1}{2}. Thus, we have:

23÷2=23×12 \frac{2}{3} \div 2 = \frac{2}{3} \times \frac{1}{2}

Step 2: Perform the multiplication:

2×13×2=26 \frac{2 \times 1}{3 \times 2} = \frac{2}{6}

Simplify 26\frac{2}{6} by dividing the numerator and the denominator by their greatest common divisor, which is 2:

26=2÷26÷2=13 \frac{2}{6} = \frac{2 \div 2}{6 \div 2} = \frac{1}{3}

Thus, the solution to the problem is 13\frac{1}{3}.

Answer

13 \frac{1}{3}

Exercise #11

Complete the following exercise:

39:3=? \frac{3}{9}:3=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, let's follow these steps:

  • Step 1: Convert the division of the fraction by the whole number into multiplication by the reciprocal of that whole number.
  • Step 2: Calculate the new fraction.
  • Step 3: Simplify the fraction if necessary.

Step 1: We have the fraction 39\frac{3}{9} and we want to divide it by 3. We will convert this division into multiplication by the reciprocal of 3, which is 13\frac{1}{3}. Thus, the operation becomes:

39×13\frac{3}{9} \times \frac{1}{3}

Step 2: Perform the multiplication. Multiply the numerators together and the denominators together:

Numerator: 3×1=33 \times 1 = 3
Denominator: 9×3=279 \times 3 = 27

This results in the fraction 327\frac{3}{27}.

Step 3: Simplify 327\frac{3}{27}. Notice that the numerator and the denominator have a common factor of 3:

Divide both the numerator and the denominator by 3:

3÷327÷3=19\frac{3 \div 3}{27 \div 3} = \frac{1}{9}

Therefore, the solution to the problem is 19\frac{1}{9}.

Answer

19 \frac{1}{9}

Exercise #12

Complete the following exercise:

108:2=? \frac{10}{8}:2=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of dividing the fraction 108\frac{10}{8} by the whole number 2, we will follow these steps:

  • Step 1: Rewrite the division as multiplication by the reciprocal.
  • Step 2: Simplify the resulting fraction, if possible.

Now, let's work through each step:

Step 1: We need to divide 108\frac{10}{8} by 2. According to the division rule for fractions, dividing by a whole number is equivalent to multiplying by its reciprocal. Therefore, we will multiply 108\frac{10}{8} by 12\frac{1}{2}:

108×12 \frac{10}{8} \times \frac{1}{2}

Step 2: Now, perform the multiplication:

10×18×2=1016 \frac{10 \times 1}{8 \times 2} = \frac{10}{16}

Next, simplify the fraction 1016\frac{10}{16}. The greatest common divisor of 10 and 16 is 2:

Divide the numerator and the denominator by their greatest common divisor:

10÷216÷2=58 \frac{10 \div 2}{16 \div 2} = \frac{5}{8}

Therefore, the simplified result of the division is 58\frac{5}{8}.

From the answer choices provided, the correct choice is 58\frac{5}{8}.

Thus, the solution to the problem is 58\frac{5}{8}.

Answer

58 \frac{5}{8}

Exercise #13

Complete the following exercise:

1216:3=? \frac{12}{16}:3=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem 1216:3 \frac{12}{16} : 3 , we will follow these steps:

  • Step 1: Restate the division as a multiplication by using the reciprocal of the divisor. The reciprocal of 3 is 13\frac{1}{3}.
  • Step 2: Multiply the fraction by the reciprocal of the divisor: 1216×13 \frac{12}{16} \times \frac{1}{3} .
  • Step 3: Multiply the numerators: 12×1=1212 \times 1 = 12.
  • Step 4: Multiply the denominators: 16×3=4816 \times 3 = 48.
  • Step 5: Simplify the resulting fraction 1248 \frac{12}{48} .
  • Step 6: Both the numerator and the denominator can be divided by 12, which is the greatest common divisor: 12÷1248÷12=14\frac{12 \div 12}{48 \div 12} = \frac{1}{4}.

Therefore, the solution to the problem is 14 \frac{1}{4} .

Answer

14 \frac{1}{4}