Percentage Calculator

Calculate any percentage instantly.

Three powerful modes: find a percent of a number, find what percent one number is of another, or calculate a percentage change between two values.

Percentage (%)

Of Number

How to Calculate Percentages

Percentages are one of the most essential concepts in everyday math — used for calculating discounts, tax, interest rates, tips, exam scores, and statistical data. A percentage is simply a way to express a ratio as a fraction of 100. For example, 25% means 25 out of every 100, or 0.25 in decimal form. Our percentage calculator covers the three most common use cases to make your life easier.

Frequently Asked Questions

How do I calculate what percent one number is of another?

Divide the part by the whole, then multiply by 100. For example, to find what percent 25 is of 200: 25 ÷ 200 × 100 = 12.5%.

How do I calculate a percentage of a number?

Multiply the number by the percentage, then divide by 100. For example, 15% of 80 = 80 × 15 ÷ 100 = 12.

How do I calculate percentage increase?

Percentage increase = ((New Value - Old Value) / Old Value) × 100. For example, from 50 to 75: (75 - 50) / 50 × 100 = 50% increase.

How do I calculate percentage decrease?

Percentage decrease = ((Old Value - New Value) / Old Value) × 100. For example, from 100 to 80: (100 - 80) / 100 × 100 = 20% decrease.

What is the difference between percent and percentage?

'Percent' refers to a specific rate (e.g., 25 percent), while 'percentage' is a more general term for a portion of a whole expressed in hundredths. In everyday usage, they are often used interchangeably.

How is percentage used in real life?

Percentages are used everywhere: calculating discounts during sales, determining tax amounts, understanding interest rates on loans, reading nutrition labels, tracking exam scores, and analyzing statistics in news reports.