Percentage Calculator
Three types of percentage calculations. Results update as you type.
Calculator 1 — What is X% of Y?
What is
% of
?
Calculator 2 — X is what % of Y?
is what % of
?
Calculator 3 — Percentage change from X to Y
From
to
Quick Percentage Reference
10% of a number
Divide by 10
25% of a number
Divide by 4
50% of a number
Divide by 2
75% of a number
Multiply by 3, divide by 4
20% tip on $X
Move decimal, multiply by 2
VAT / Sales tax
Price × (1 + rate/100)
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Frequently Asked Questions
To find X% of Y: multiply Y by X and divide by 100. Example: 15% of 200 = 200 × 15 / 100 = 30.
Percentage change = ((New − Old) / |Old|) × 100. A positive result is an increase, a negative result is a decrease.
Multiply the number by (1 + percentage/100). Example: add 20% to 150 = 150 × 1.20 = 180.
Multiply by (1 − percentage/100). Example: subtract 15% from 200 = 200 × 0.85 = 170.