Percentage Calculator
Calculate percentages easily — find X% of a number, what percentage one number is of another, or percentage change between two values.
Results
Percentage Formulas
X% of Y = Y × X / 100
X is what % of Y = (X / Y) × 100
% Change = ((New − Old) / Old) × 100
Frequently Asked Questions
How do I calculate 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 increase, negative means decrease.