Percentage Calculator
Solve any percentage problem in seconds — find what a percentage of a number is, what percent one number is of another, or the percentage increase or decrease between two values.
How to Use the Percentage Calculator
- 1Choose the tab that matches your problem: X% of Y, X is what % of Y, or percentage increase/decrease.
- 2Enter your numbers into the fields.
- 3The result updates instantly with a clear, labeled answer.
Percentage Formulas Used
- X% of Y: (X ÷ 100) × Y
- X is what % of Y: (X ÷ Y) × 100
- Percentage change: ((New − Old) ÷ |Old|) × 100
Worked example (markup): a product costing you ₹400 sold for ₹500 has a markup of ((500-400)÷400)×100 = 25%. Worked example (markdown/discount):a ₹500 item marked down to ₹400 is a ((400-500)÷500)×100 = -20% change — a 20% discount, even though the rupee amount is identical to the markup example above. The percentage isn't symmetric because the base value (Old) is different in each direction.
Percentage points vs percent:these are often confused. If a rate moves from 20% to 25%, that's a change of 5 percentage points, but a percentage increase of 25% (since 5 is 25% of the original 20). News headlines frequently blur this distinction — use the "% Increase / Decrease" tab above for the correct percent-change figure.
Frequently Asked Questions
Formula and figures on this page were checked against official sources as of August 2026. See our editorial process. This tool is for informational purposes only and isn't financial, tax or medical advice.