1001 Pro Calculators and Tools · Maths
Percentage calculator: what is X% of Y
Put in the percentage and the number. The answer updates as you type.
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To find a percentage of a number, multiply the number by the percentage and divide by 100: 15% of 240 is 240 × 15 ÷ 100 = 36.
A quick check in your head: 10% is the number divided by 10, so 5% is half of that and 20% is double it.
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Questions people ask
How do I work out a percentage of a number?
Multiply the number by the percentage, then divide by 100. For example, 15% of 240 is 240 × 15 ÷ 100 = 36.
What is 20% of 50?
10. 50 × 20 ÷ 100 = 10.