Solve Fraction Division: 1/2 ÷ 3/5 Step-by-Step

Fraction Division with Reciprocal Method

Complete the following exercise:

12:35=? \frac{1}{2}:\frac{3}{5}=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Instead of division, we'll use multiplication by the reciprocal
00:09 We'll swap between the numerator and denominator of the fraction
00:13 Make sure to multiply numerator by numerator and denominator by denominator
00:19 Calculate the multiplications
00:22 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

Complete the following exercise:

12:35=? \frac{1}{2}:\frac{3}{5}=\text{?}

2

Step-by-step solution

To solve the division 12÷35 \frac{1}{2} \div \frac{3}{5} , we will follow the multiplication by the reciprocal method. Here are the steps:

  • Step 1: Find the reciprocal of the divisor 35 \frac{3}{5} , which is 53 \frac{5}{3} .
  • Step 2: Multiply the dividend 12 \frac{1}{2} by the reciprocal found in Step 1: 12×53 \frac{1}{2} \times \frac{5}{3} .
  • Step 3: Multiply the numerators: 1×5=5 1 \times 5 = 5 .
  • Step 4: Multiply the denominators: 2×3=6 2 \times 3 = 6 .
  • Step 5: Combine the results to form the fraction 56 \frac{5}{6} .

The simplified result of 12÷35 \frac{1}{2} \div \frac{3}{5} is 56 \frac{5}{6} .

3

Final Answer

56 \frac{5}{6}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Division by a fraction equals multiplication by its reciprocal
  • Technique: Convert 35 \frac{3}{5} to 53 \frac{5}{3} , then multiply 12×53=56 \frac{1}{2} \times \frac{5}{3} = \frac{5}{6}
  • Check: Verify 56×35=1530=12 \frac{5}{6} \times \frac{3}{5} = \frac{15}{30} = \frac{1}{2}

Common Mistakes

Avoid these frequent errors
  • Dividing numerators and denominators directly
    Don't divide 12÷35 \frac{1}{2} \div \frac{3}{5} as 1÷32÷5=0.330.4 \frac{1÷3}{2÷5} = \frac{0.33}{0.4} ! This creates messy decimals and wrong answers. Always flip the second fraction and multiply: 12×53 \frac{1}{2} \times \frac{5}{3} .

Practice Quiz

Test your knowledge with interactive questions

Solve the following exercise:

\( \frac{1}{4}:\frac{1}{2}=\text{?} \)

FAQ

Everything you need to know about this question

Why do I flip the second fraction?

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Division by a fraction is the same as multiplication by its reciprocal. Think of it this way: dividing by 35 \frac{3}{5} asks "how many 35 \frac{3}{5} 's fit into 12 \frac{1}{2} ?" Flipping and multiplying gives the same answer!

How do I remember which fraction to flip?

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Always flip the second fraction (the divisor). In 12÷35 \frac{1}{2} \div \frac{3}{5} , you flip 35 \frac{3}{5} to get 53 \frac{5}{3} . The first fraction stays the same!

What if I get an improper fraction?

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Improper fractions like 56 \frac{5}{6} are perfectly fine answers! You can leave them as improper fractions or convert to mixed numbers if needed. Always check if the fraction can be simplified first.

Can I use this method with mixed numbers?

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Yes! First convert any mixed numbers to improper fractions, then use the flip-and-multiply method. Mixed numbers make the reciprocal step much harder to see.

How do I check my division answer?

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Multiply your answer by the original divisor. In this case: 56×35 \frac{5}{6} \times \frac{3}{5} should equal 12 \frac{1}{2} . If it matches, you're correct!

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