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Percentage Calculator

Find percentages, increases, decreases

Formulas

X% of YResult = (X ÷ 100) × Y
X is what % of YResult = (X ÷ Y) × 100
% ChangeResult = ((Y − X) ÷ |X|) × 100
X + Y%Result = X + (X × Y ÷ 100)

Common Examples

Sales tax: What is 8.5% of $120? → $10.20

Grade: 42 is what % of 50? → 84%

Price drop: % change from $80 to $60? → −25%

Tip: $45.00 + 20%? → $54.00

FAQ

How do I calculate a percentage of a number?

To find X% of Y, multiply Y by X and divide by 100. For example, 15% of 200 = (200 × 15) ÷ 100 = 30.

How do I calculate percentage change?

Percentage change = ((New Value − Old Value) ÷ |Old Value|) × 100. A positive result means an increase; negative means a decrease.