Solve the Fraction Division: 6/10 ÷ 2/5 Step-by-Step

Fraction Division with Reciprocal Method

Solve the following exercise:

610:25=? \frac{6}{10}:\frac{2}{5}=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:09 Let's solve this problem together.
00:12 First, divide the top number by the top number, and the bottom number by the bottom number.
00:18 Now, calculate the results of those divisions.
00:26 Next, break down the number 3 into 2 plus 1.
00:33 Then, split the fraction into a whole number and a remainder.
00:39 Remember, any number divided by itself is always 1.
00:43 Now, change it into a mixed fraction.
00:46 And that's how we find the solution! Great job!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

610:25=? \frac{6}{10}:\frac{2}{5}=\text{?}

2

Step-by-step solution

To solve the division 610÷25 \frac{6}{10} \div \frac{2}{5} , we use the method of multiplying by the reciprocal of the divisor.

First, identify the reciprocal of the divisor 25 \frac{2}{5} . The reciprocal is obtained by swapping the numerator and denominator, resulting in 52 \frac{5}{2} .

Next, replace the division operation with multiplication by the reciprocal:

610×52 \frac{6}{10} \times \frac{5}{2} .

Now, perform the multiplication of the fractions by multiplying numerator by numerator and denominator by denominator:

6×510×2=3020 \frac{6 \times 5}{10 \times 2} = \frac{30}{20} .

Simplify the fraction 3020 \frac{30}{20} by finding the greatest common divisor. Both 30 and 20 can be divided by 10:

30÷1020÷10=32 \frac{30 \div 10}{20 \div 10} = \frac{3}{2} .

The simplified fraction 32 \frac{3}{2} can also be expressed as a mixed number:

112 1\frac{1}{2} .

Therefore, the solution to the problem 610÷25 \frac{6}{10} \div \frac{2}{5} is 112 1\frac{1}{2} , aligning with choice 1.

3

Final Answer

112 1\frac{1}{2}

Key Points to Remember

Essential concepts to master this topic
  • Division Rule: Multiply by reciprocal of the divisor fraction
  • Technique: 610÷25=610×52=3020 \frac{6}{10} \div \frac{2}{5} = \frac{6}{10} \times \frac{5}{2} = \frac{30}{20}
  • Check: Convert 32=112 \frac{3}{2} = 1\frac{1}{2} and verify: 1.5×25=610 1.5 \times \frac{2}{5} = \frac{6}{10}

Common Mistakes

Avoid these frequent errors
  • Dividing numerators and denominators directly
    Don't divide 610÷25 \frac{6}{10} \div \frac{2}{5} as 6÷210÷5=32 \frac{6÷2}{10÷5} = \frac{3}{2} by accident = wrong method! This only works by coincidence here but fails with most problems. Always flip the second fraction first, then multiply.

Practice Quiz

Test your knowledge with interactive questions

Complete the following exercise:

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

FAQ

Everything you need to know about this question

Why do I flip the second fraction when dividing?

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Division by a fraction means "how many groups" of that size fit into the first amount. Flipping and multiplying gives the same result as the formal definition of division!

What's the reciprocal of 25 \frac{2}{5} ?

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The reciprocal is 52 \frac{5}{2} - just swap the top and bottom numbers. When you multiply a fraction by its reciprocal, you always get 1!

Do I always need to simplify my answer?

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Yes! Always simplify to lowest terms. 3020 \frac{30}{20} should become 32 \frac{3}{2} by dividing both parts by their greatest common factor of 10.

Should I leave my answer as an improper fraction or mixed number?

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Both 32 \frac{3}{2} and 112 1\frac{1}{2} are correct! Mixed numbers are often easier to understand, but check what format your teacher prefers.

How can I check if 112 1\frac{1}{2} is right?

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Convert to decimal: 112=1.5 1\frac{1}{2} = 1.5 . Then verify: 1.5×25=1.5×0.4=0.6=610 1.5 \times \frac{2}{5} = 1.5 \times 0.4 = 0.6 = \frac{6}{10}

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