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.
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.