Percentage Calculator
Percent of, what percent, percent change, and discounts — all in one clean tool.
A% of B
Result:
What percent is A of B?
Result:
Percentage change
Result:
Discount calculator
New price:
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Percentage FAQs
How do I calculate A% of B?
Convert A to a decimal (divide by 100) and multiply by B. Example: 15% of 80 = 12.
How do I find what percent A is of B?
Divide A by B and multiply by 100. Example: 25 of 50 → 25/50 × 100 = 50%.
How do I compute percentage change?
(New − Old) ÷ Old × 100%. A positive result is an increase; negative is a decrease.