Percentage Calculator — Percent of, Percent Change & More
Free percentage calculator. Find X% of a number, what percent one number is of another, percentage increase or decrease, and add or subtract a percentage.
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Solve everyday percentage problems quickly: find a percentage of a number, work out what percent one number is of another, calculate the percentage change between two values, or increase and decrease a number by a percentage. Each mode shows the formula result clearly, useful for discounts, marks, growth and tax.
How to use the Percentage Calculator
- Choose the type of percentage question.
- Enter the two numbers.
- Read the answer instantly.
Percentage Calculator — frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 250 = 250 × 20 ÷ 100 = 50.
How is percentage change calculated?
(New value − Old value) ÷ Old value × 100.
What is the difference between percent and percentage points?
Going from 10% to 12% is a 2 percentage-point rise but a 20% relative increase.
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