Math
Percentage Calculator
Calculate percentages instantly β find a percentage of a number, percentage increase, or what percent X is of Y.
Result
β
How It Works
To find a percentage of a number: multiply the number by (percentage Γ· 100). For example, 20% of 50 = 50 Γ 0.20 = 10.
Example
20% of 50 = 10. Useful for tips, discounts, tax calculations, and test scores.
Frequently Asked Questions
How do I calculate percentage increase?
Percentage increase = ((New Value β Old Value) / Old Value) Γ 100. Going from 80 to 100 is a 25% increase.
How do I find what percent X is of Y?
Divide X by Y and multiply by 100. Example: 30 is what percent of 150? (30 Γ· 150) Γ 100 = 20%.
How do I calculate a tip?
Multiply the bill by the tip percentage / 100. An 18% tip on $45 = 45 Γ 0.18 = $8.10.