Percentage Calculator
Find a percentage of any number
Quickly find a percentage of any number — plus that number increased or decreased by the percentage.
How to find a percentage
A percent of a number is number × percent ÷ 100. So 20% of 150 is 150 × 0.20 = 30. The calculator also shows the value after adding or subtracting that percentage — handy for tips, raises and markdowns.
Three percentage questions
Most everyday percentage problems are one of three: "what is X% of Y?" (multiply), "X is what percent of Y?" (divide X by Y, then ×100), and "X is Y% of what?" (divide X by the percent as a decimal). This tool answers the first directly and shows the increase and decrease for the rest.
Percentage change vs. percentage points
Watch the difference between a percentage change and percentage points. If a rate rises from 5% to 6%, that's a 1 percentage-point increase but a 20% relative increase. Mixing the two is one of the most common sources of confusion in news headlines and reports.
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 15% of 80: 80 × 15 ÷ 100 = 12.
How do I add a percentage to a number?
Find the percentage of the number, then add it to the original — shown automatically above.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 18 out of 24 is 18 ÷ 24 = 0.75, or 75%.