Percentage Calculator
Enter a percentage and a number to find the resulting value - useful for tips, discounts, grades, and quick everyday math.
Last updated: August 24, 2026
Frequently asked questions
How do I calculate a percentage of a number by hand?
Divide the percent by 100, then multiply by the number. For 20% of 150: 0.20 × 150 = 30.
How do I find what percent one number is of another?
Divide the part by the whole, then multiply by 100. For example, 30 is what percent of 150? 30 ÷ 150 × 100 = 20%.