Percentage Calculator
Calculate percentages, discounts and percentage changes instantly.
What is X% of Y?
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X is what % of Y?
is—% of
Percentage change
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How to calculate percentages
To find X% of Y: multiply Y by X and divide by 100. Example: 20% of 500 = (500 × 20) ÷ 100 = 100.
Percentage change formula
Percentage change = ((New − Old) ÷ Old) × 100. A positive result means an increase; negative means a decrease.