Three handy percentage calculators in one: percent of a number, percent ratio, and percent change.
Result = (X ÷ 100) × Y. For example, 25% of 200 = (25÷100)×200 = 50.
Percentage = (X ÷ Y) × 100. For example, 50 is 25% of 200 because (50÷200)×100 = 25.
Change% = ((New – Old) ÷ Old) × 100. A positive result is an increase; negative is a decrease.
This percentage calculator combines three of the most common percentage problems into one place: finding X percent of Y, checking what percent one number is of another, and measuring percentage increase or decrease. It is useful for students, shoppers, business owners, marketers, and anyone working with prices, marks, margins, or analytics.
Because the page includes multiple calculation modes, you can move from one type of question to another without leaving the tool. That makes it especially practical for exam practice, discount calculations during shopping, salary comparisons, and reporting growth or decline over time. The formulas are shown on the page as well, so it works both as a quick calculator and as a learning aid.
Find 20 percent of a listed price before checkout.
Check what percentage your scored marks represent out of the total.
Measure percentage increase in revenue, website traffic, or subscribers.