Percentage Calculator
Calculate percentages in three modes: X% of Y, X is what % of Y, and percentage change.
Percentage Result
How to Use the Percentage Calculator
Select a mode: find X% of Y, find what percent X is of Y, or calculate percentage change between two values.
Formula
X% of Y: Result = Y × X / 100
X is what % of Y: % = (X / Y) × 100
% change: % = (New − Old) / |Old| × 100
Frequently Asked Questions
How do I add a percentage to a number?
Multiply the number by (1 + percentage/100). For example, adding 20% to 150: 150 × 1.20 = 180.
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