Percentage Calculator
Three quick percentage tools in one place — no formulas needed.
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = (15 × 200) ÷ 100 = 30. The first calculator above does this instantly.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 is what % of 200? (30 ÷ 200) × 100 = 15%. Use the second calculator above for this.
How do I calculate percentage increase or decrease?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A positive result is an increase; a negative result is a decrease. For example, from 80 to 100: (100 − 80) ÷ 80 × 100 = +25%.