How to multiply fractions

Part ofMathsFractionsYear 6

Multiplying fractions

When you multiply numbers together, you’re looking at how many groups of, or lots of, something you have.

You can use this same thinking, when you are multiplying fractions. For example:

\( \frac{2}{3} \) × 3 = ?

You can think about this as 3 lots of \( \frac{2}{3} \), or 3 group of \( \frac{2}{3} \), which is 2.

The sum ⅔ times 3 = ? and below are 3 watermelons divided into thirds. Each watermelon has two thirds highlighted.

Therefore:

\( \frac{2}{3} \) × 3 = 2

You can multiply fractions by whole integers, or multiply fractions together.

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Activity: How to multiply fractions

Complete this interactive activity to learn more about multiplying fractions and then put your knowledge to the test with a quiz.

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How to multiply fractions

When multiplying fractions, you're looking at how many groups of, or lots of, something you have.

Look at this calculation:

6 × 3 = ?

You are looking for 3 groups of 6, which is 18.

3 bar models each with 6 parts

Now, look at this calculation:

6 × \( \frac{1}{2} \) = ?

You are looking for a half group of 6, which is 3.

bar model containing 6 parts, with 3 parts highlighted

Sometimes you need to multiply a fraction by another fraction.

\( \frac{1}{4} \) × \( \frac{1}{3} \) = ?

You need to find \( \frac{1}{3} \) of a group of \( \frac{1}{4} \), which is \( \frac{1}{12} \).

A bar model showing one quarter, divided into thirds

You can also find the answer to a calculation using only the fraction symbols.

In this calculation, you are looking for \( \frac{2}{3} \) of a group of \( \frac{5}{6} \):

five sixths multiplied by two thirds equals ten eighteenths

When you multiply two fractions, you multiply the denominators.

6 multiplied by 3 gives you the new denominator of 18, or eighteenths.

Then multiply the numerators together, to find out how many of these parts there are.

5 multiplied by 2 gives you the new numerator of 10.

So the answer is \( \frac{10}{18} \).

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Example 1

A line of dots divided into 3 sections, each with 4 dots inside.

If you have \(\frac{1}{3}\) of a group of 12, how many do you have?

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Example 2

A rectangle divided into 4 sections. The first section is marked with the fraction one quarter.

Solve this calculation:

\(\frac{1}{4}\) × \(\frac{1}{3}\) = ?

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Example 3

An equation showing two thirds multiplied by four fifths = ?

Which numbers do you multiply to work out \(\frac{2}{3}\) x \(\frac{4}{5}\)?

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Play our fun maths game Guardians: Defenders of Mathematica. game

Use your times tables and more maths skills to defeat monsters and reclaim the Kingdom of Mathematica

Play our fun maths game Guardians: Defenders of Mathematica
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More on Fractions

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