^{LAST UPDATE: September 24th, 2020 Calculate Percent of a Number Percent (%) Of Percentage of the number 24.42 Reset Calculate what percent 62.5 % Reset Calculate percent of what is _____ percent of what? 125 % Reset More percentage calculators Percentages Percentage increase Percentage decrease Percentage change Percentage error} Let's say the question is: What is 10% of 200?. Here's how to do it: Change the percentage figure into a decimal by dividing the figure by 100. So, 10% becomes 10/100 = 0.1. Multiply the decimal figure by the full amount. So, 0.1 x 200 = 20. This gives you your answer. 10% of 200 is 20. The formula for this calculation looks like this: 1) What is 10% of 14? Always use this formula to find a percentage: % / 100 = Part / Whole replace the given values: 10 / 100 = Part / 14. Cross multiply: 10 x 14 = 100 x Part, or. 140 = 100 x Part . Now, divide by 100 and get the answer: Part = 140 / 100 = 1.4 e4H9.