Percentage Calculator
Three modes: find a percentage, calculate what percent, or compute change.
What is of ?
%
is what % of ?
% change from to
Result
Result
Change
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Frequently Asked Questions
To find X% of Y: multiply Y × (X ÷ 100). Example: 20% of 150 = 150 × 0.20 = 30.
Percentage change = ((New Value − Old Value) ÷ Old Value) × 100. If positive, it's an increase; if negative, it's a decrease.
Formula: (X ÷ Y) × 100. Example: 45 is what % of 180? → (45 ÷ 180) × 100 = 25%.