Percentage Calculator
Free percentage calculator. Find what percent one number is of another, calculate percentage increase or decrease.
What is X% of Y?
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X is what percent of Y?
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Percentage change from A to B
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Quick guide: percentages
A percentage is a number out of 100. Common formulas:
X% of Y = (X ÷ 100) × Y
X as % of Y = (X ÷ Y) × 100
% change = ((New − Old) ÷ Old) × 100
Example: 15% of 200 = 30. Going from 80 to 100 is a 25% increase.
Read the full explanation: Understanding Percentages