How do I calculate a percentage of a number?

To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.

How is percentage change calculated?

Percentage change is (new value − original value) ÷ |original value| × 100. A positive result is an increase, a negative result is a decrease.

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Percentage Calculator

Find the part, the whole, or the change. Percentages made simple.

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Choose the percentage question you want to answer.

YOUR RESULTS

Calculated amount

Percentage20%

Base value150

20% of 150 is 30.

Behind the numbers

A percentage expresses a value as a fraction of 100. Use “percentage of” to find a part, “what percent” to compare a part to a whole, and “percentage change” to measure an increase or decrease.

Percentage of a value = percentage ÷ 100 × value

Percentage Calculator

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Behind the numbers

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