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Percentage Calculator

Three quick calculators in one. Results update as you type.

What is X% of Y?

X is what percent of Y?

Percentage change from X to Y

Frequently asked questions

How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.

How is percentage change calculated?

Subtract the old value from the new value, divide by the old value and multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25% increase.

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