Percentage Calculator

Find a percentage of a number, work out “is what percent”, measure percentage change, or increase and decrease a value.

Percentage tools

Result

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How do I find a percentage of a number? +

Multiply the number by the percent, then divide by 100. Example: 16% of 2,500 = 2,500 × 0.16 = 400.

How do I find what percent one number is of another? +

Divide the part by the whole, then multiply by 100. Example: 400 is 16% of 2,500.

How is percentage change calculated? +

((new − old) ÷ old) × 100. A rise from 80 to 100 is a 25% increase. The starting value cannot be zero.

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