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Percentage Calculator

Free percentage calculator — updated for 2025. Accurate, instant, no sign-up needed.

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Percentage Calculator

Three modes: find %, find value, find % change

① What is X% of Y?
%
Result:
② X is what % of Y?
Result:
③ Percentage Change from X to Y
Result:

Percentage Formulas

X% of Y = (X/100) × Y X is what % of Y = (X ÷ Y) × 100 % Change = ((New − Old) ÷ Old) × 100
How do I calculate a discount?
Use formula ①: "What is 20% of $85?" = $17 discount. Subtract from original: $85 − $17 = $68 sale price.
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