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Express 15 as a percentage of 20.

April 9, 2026Mathematics

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To express one number as a percentage of another, divide the first number by the second number and then multiply by $100\%$ .
$\text{Percentage} = \frac{\text{Part}}{\text{Whole}} \times 100\%$
In this problem, the part is 15 and the whole is 20.
Substitute the given values into the formula.
$\text{Percentage} = \frac{15}{20} \times 100\%$
Simplify the fraction $\frac{15}{20}$ .
$\text{Percentage} = \frac{3 \times 5}{4 \times 5} \times 100\%$ $\text{Percentage} = \frac{3}{4} \times 100\%$
Convert the fraction to a decimal and multiply by $100\%$ .
$\text{Percentage} = 0.75 \times 100\%$ $\text{Percentage} = 75\%$
The final answer is $\boxed{\text{75\%}}$ .

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