Percentage Calculator
Three percentage modes
Pick a mode, enter two numbers and get the answer with the working shown. Decimals and negative numbers are supported.
Percentage Calculator — enter your values
15% of 250
37.5
- Value plus percentage
- 287.5
- Value minus percentage
- 212.5
Calculation
- (15 ÷ 100) × 250 = 37.5
Formula
part = (percent ÷ 100) × value • percent = (part ÷ value) × 100
Worked examples
15% of 250
(15 ÷ 100) × 250
= 37.5
45 is what percent of 180?
(45 ÷ 180) × 100
= 25%
Add 20% to 60
60 + (0.2 × 60)
= 72
Formula
A percentage is a fraction of 100, so part = (percent ÷ 100) × value. Reversing it gives percent = (part ÷ value) × 100.
Frequently asked questions
- How do I calculate a percentage increase?
- Multiply the original value by the percentage and add it back, which is the “value plus percentage” figure shown above.