How do I find what percent one number is of another?

Divide the part by the whole, then multiply by 100. For example, 20 out of 80 is 20 ÷ 80 × 100 = 25%.

How do I calculate X percent of a number?

Divide the percent by 100, then multiply by the number. For example, 25% of 80 is 0.25 × 80 = 20.

Solve percentages three ways — X% of Y, X is what % of Y, and percent change — with steps.