Multiply Mixed Numbers: 2⅔ × 1¾ Step-by-Step Solution

Mixed Number Multiplication with Improper Fractions

227×134= 2\frac{2}{7}\times1\frac{3}{4}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Convert mixed fractions to fractions
00:15 Calculate the numerators
00:27 Make sure to multiply numerator by numerator and denominator by denominator
00:35 Calculate the multiplications
00:41 Calculate the quotient
00:44 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

227×134= 2\frac{2}{7}\times1\frac{3}{4}=

2

Step-by-step solution

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

  • Convert each mixed number into an improper fraction.
  • Multiply the two improper fractions.
  • Simplify the resulting fraction if necessary.
  • Convert the final product back to a mixed number if desired.

Now, let's work through each step:

Step 1: Convert the mixed numbers into improper fractions.
For 227 2\frac{2}{7} : 227=2×7+27=14+27=167 2\frac{2}{7} = \frac{2 \times 7 + 2}{7} = \frac{14 + 2}{7} = \frac{16}{7} For 134 1\frac{3}{4} : 134=1×4+34=4+34=74 1\frac{3}{4} = \frac{1 \times 4 + 3}{4} = \frac{4 + 3}{4} = \frac{7}{4}

Step 2: Multiply the improper fractions.
167×74=16×77×4=11228 \frac{16}{7} \times \frac{7}{4} = \frac{16 \times 7}{7 \times 4} = \frac{112}{28}

Step 3: Simplify the resulting fraction.
Since 112÷28=4 112 \div 28 = 4 , 11228=4 \frac{112}{28} = 4

The final result is a whole number, so there is no need for conversion back to a mixed number.

Therefore, the solution to the problem is 4 4 .

3

Final Answer

4 4

Key Points to Remember

Essential concepts to master this topic
  • Rule: Convert mixed numbers to improper fractions before multiplying
  • Technique: 227=167 2\frac{2}{7} = \frac{16}{7} using (2×7+2)/7 formula
  • Check: Verify 167×74=11228=4 \frac{16}{7} \times \frac{7}{4} = \frac{112}{28} = 4

Common Mistakes

Avoid these frequent errors
  • Multiplying whole and fractional parts separately
    Don't multiply 2×1=2 and 27×34=628 \frac{2}{7} \times \frac{3}{4} = \frac{6}{28} separately = wrong answer of 2628 2\frac{6}{28} ! This ignores cross-multiplication between whole and fractional parts. Always convert to improper fractions first, then multiply as one operation.

Practice Quiz

Test your knowledge with interactive questions

\( 1\frac{4}{5}\times1\frac{1}{3}= \)

FAQ

Everything you need to know about this question

Why can't I just multiply the whole numbers and fractions separately?

+

Because mixed numbers represent one complete value! When you multiply 227×134 2\frac{2}{7} \times 1\frac{3}{4} , you need to account for all cross-products: whole×whole, whole×fraction, fraction×whole, and fraction×fraction.

How do I convert a mixed number to an improper fraction?

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Use the formula: (whole × denominator + numerator) ÷ denominator. For 227 2\frac{2}{7} : (2×7+2)/7 = 16/7. The denominator stays the same!

What if my final answer is an improper fraction?

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Check if it simplifies to a whole number first! 11228=4 \frac{112}{28} = 4 because 112÷28=4 exactly. If it doesn't divide evenly, convert back to a mixed number.

Do I always have to convert back to a mixed number?

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Not necessarily! If your answer is a whole number like 4, leave it as is. Mixed numbers are only needed when you have a proper fraction remaining after division.

How can I check if my multiplication is correct?

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  • Estimate: 227 2\frac{2}{7} is close to 2.3, 134 1\frac{3}{4} is 1.75, so 2.3×1.75 ≈ 4
  • Use a calculator to verify: 16/7 × 7/4 = 112/28 = 4

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