MathPopular
Percentage calculator
A part of a whole, a share, a change, or a markup.
Result
Fill any question. Empty ones are skipped.
How this works
“15% of 80” is 80 times 0.15. “50 is what percent of 200” is 50 divided by 200, times 100. Percent change is the difference divided by the starting number, times 100. The starting number cannot be zero. Increase and decrease move the starting amount by that percent of itself.
An example
15% of 80 is 12. 50 is 25% of 200. From 100 to 150 is a 50% increase. 200 decreased by 10% is 180. The example button fills all four.