Percentage Calculator
Solve every common percentage problem: of, change, and what percent.
Your details
How the percentage calculator works
Three modes cover almost every percentage question you will ever need to answer.
Formula
X% of Y = X·Y/100 • change = (new − old) ÷ old × 100
Worked example
25% of 200 is 50; going from 200 to 250 is a 25% increase.
Frequently asked questions
Is a 50% rise then a 50% fall back to the start?
No. 100 → 150 → 75. Percentage changes compound from the new base each time.
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