Percentage Calculator

What is X% of Y?

% of = —

X is what % of Y?

is — % of

Percentage change (from A to B)

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Add / subtract a percentage

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Frequently Asked Questions

To find X% of Y, multiply Y × X ÷ 100. Example: 20% of 150 = 150 × 20 ÷ 100 = 30.
Percentage change = ((New − Original) ÷ |Original|) × 100. Positive means increase, negative means decrease.
Use the "Add/subtract a percentage" panel. Enter the original price, select subtract, and enter the discount percentage.
Yes, completely free.