# What is 1/5 of 20?

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55
Mar 15, 2018

4

#### Explanation:

To multiply a fraction and a whole number, turn the whole number into a fraction with a denominator of 1.

$\frac{1}{5} \times \frac{20}{1}$

Multiply the top numbers (numerators) and the bottom numbers (denominators)

$\frac{1 \times 20}{5 \times 1} = \frac{20}{5} = 4$

Then teach the underlying concepts
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#### Explanation

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#### Explanation:

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2
Mar 15, 2018

$20 \div 5 = 4$

#### Explanation:

To find $\frac{1}{5}$ (said as 'one fifth') is the same as dividing by $5$

So $20$ divided by $5$ is $4$

In the same way, $\frac{1}{2}$ of $20$ is the same as $20$ divided by $2$

$\frac{1}{4}$ of $20$ is $20$ divided by $4 \text{ } \rightarrow 20 \div 4 = 5$

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