Percentage Calculator
Calculate percentages, discounts, increases, and percentage differences
About Percentage Calculator
Percentages are used in everyday scenarios — discounts, tax rates, grade calculations, interest rates, and statistical analysis. This calculator provides multiple percentage calculation modes to cover the most common use cases: finding what X% of a number is, calculating what percentage one number is of another, and finding percentage change between two values.
FAQ
- How do I calculate X% of a number?
- Multiply the number by X and divide by 100. For example, 20% of 150 = 150 × 20 / 100 = 30.
- How do I calculate percentage change?
- Subtract the original value from the new value, divide by the original value, and multiply by 100. For example, from 80 to 100: (100 - 80) / 80 × 100 = 25% increase.
- How do I find what percentage A is of B?
- Divide A by B and multiply by 100. For example, 30 is what percent of 120? → 30 / 120 × 100 = 25%.
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