How do I calculate a percentage of a number?

To find what percentage one number is of another, use the formula: (Part ÷ Whole) × 100 = Percentage. For example, if you scored 45 out of 60 on a test, it's (45 ÷ 60) × 100 = 75%. Our percentage calculator makes this instant. For example, you can easily find percentage online for tips, grades, or statistics. The tool also handles percentage increase calculator and percentage decrease calculator calculations. For a percentage increase, subtract the original value from the new value, divide by the original value, and multiply by 100. For a percentage decrease, the same formula applies with the new value being lower.