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

Fraction Division with Reciprocal Method

Complete the following exercise:

12:53=? \frac{1}{2}:\frac{5}{3}=\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
00:08 We'll swap the numerator and denominator of the fraction
00:14 Make sure to multiply numerator by numerator and denominator by denominator
00:19 Calculate the products
00:24 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:

12:53=? \frac{1}{2}:\frac{5}{3}=\text{?}

2

Step-by-step solution

To solve the problem of dividing the fractions 12\frac{1}{2} by 53\frac{5}{3}, we proceed as follows:

We can simplify a division of fractions by multiplying the first fraction by the reciprocal of the second fraction. The reciprocal of a fraction is obtained by swapping its numerator and denominator.

First, we find the reciprocal of 53\frac{5}{3}, which is 35\frac{3}{5}.

Next, we multiply the fractions 12\frac{1}{2} and 35\frac{3}{5}:

12×35=1×32×5.\frac{1}{2} \times \frac{3}{5} = \frac{1 \times 3}{2 \times 5}.

This results in

310.\frac{3}{10}.

Thus, the solution to 12:53\frac{1}{2}:\frac{5}{3} is 310\frac{3}{10}.

3

Final Answer

310 \frac{3}{10}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Division of fractions means multiply by the reciprocal
  • Technique: 12÷53=12×35=310 \frac{1}{2} \div \frac{5}{3} = \frac{1}{2} \times \frac{3}{5} = \frac{3}{10}
  • Check: 310×53=1530=12 \frac{3}{10} \times \frac{5}{3} = \frac{15}{30} = \frac{1}{2}

Common Mistakes

Avoid these frequent errors
  • Dividing numerators and denominators directly
    Don't divide 12÷53 \frac{1}{2} \div \frac{5}{3} as 1÷52÷3 \frac{1÷5}{2÷3} = wrong answer! This creates confusion and doesn't follow fraction division rules. Always flip the second fraction and multiply.

Practice Quiz

Test your knowledge with interactive questions

\( \frac{1}{3}+\frac{1}{4}= \)

FAQ

Everything you need to know about this question

Why do I flip the second fraction and multiply?

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Dividing by a fraction is the same as multiplying by its reciprocal. Think of it as: "How many 53 \frac{5}{3} 's fit into 12 \frac{1}{2} ?" This is easier to calculate by multiplying 12×35 \frac{1}{2} \times \frac{3}{5} .

What's a reciprocal exactly?

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A reciprocal is when you flip a fraction upside down. The reciprocal of 53 \frac{5}{3} is 35 \frac{3}{5} . For whole numbers like 4, the reciprocal is 14 \frac{1}{4} .

How do I multiply fractions after flipping?

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Multiply straight across: numerator × numerator and denominator × denominator. So 12×35=1×32×5=310 \frac{1}{2} \times \frac{3}{5} = \frac{1×3}{2×5} = \frac{3}{10} .

Can I simplify before multiplying?

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Yes! Look for common factors to cancel first. In this problem, 1 and 3 have no common factors with 2 and 5, so we multiply first then check if the result can be simplified.

How do I check my division answer?

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Multiply your answer by the divisor (the second fraction). If you get the first fraction back, you're correct! 310×53=12 \frac{3}{10} \times \frac{5}{3} = \frac{1}{2}

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