Calculate any percentage instantly — find amounts, rates, and changes.
There are four common percentage calculations, each handled by a tab above. % of Number answers "what is 15% of 80?" — multiply 80 by 0.15 to get 12. X is % of Y answers "12 is what percent of 80?" — divide 12 by 80 and multiply by 100 to get 15%. % Change answers "what is the percentage change from 50 to 75?" — subtract the old from the new, divide by the old, and multiply by 100. Increase/Decrease applies a percentage to raise or lower a starting number.