Percentage Calculator
Three percentage calculators in one: what is X% of Y, X is what % of Y, and percentage change.
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Frequently Asked Questions
Multiply the number by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
Divide the first number by the second, then multiply by 100. For example, 30 is what percent of 200? 30 ÷ 200 × 100 = 15%.
Subtract the old value from the new value, divide by the old value, and multiply by 100. Formula: ((new - old) / old) × 100.
A positive result means the value increased (percentage increase). A negative result means the value decreased (percentage decrease).
Yes — all three calculators accept decimal inputs like 12.5 or 0.75.