Percentage Calculator
Calculate percentages, changes, and ratios instantly
About percentages
How do I calculate a percentage of a number?
Multiply the number by the percentage divided by 100. Example: 15% of 200 = 200 × 0.15 = 30.
How do I calculate percentage change?
Subtract the original from the new value, divide by the original, multiply by 100. A positive result is an increase; negative is a decrease.