Percentage Calculator
Five common percentage calculations – results update as you type.
| What is % of ? | |
| is what % of ? | % |
| % change from to | % |
| increased by % | |
| decreased by % |
How to use the Percentage Calculator
- Pick the row that matches your question.
- Type your numbers into that row.
- The answer appears instantly on the right.
Percentage formulas
- X% of Y = X × Y ÷ 100
- X is what % of Y = X ÷ Y × 100
- % change = (new − old) ÷ old × 100
- Increase by X% = Y × (1 + X/100)
- Decrease by X% = Y × (1 − X/100)
Marks percentage
To find your exam percentage, use the second row: marks obtained ÷ total marks × 100. For example, 450 out of 600 = 75%.
Salary hike
Use the third row with old and new salary to find your hike percentage. ₹50,000 to ₹56,000 is a 12% hike.
Frequently asked questions
How do I calculate marks percentage?
Divide marks obtained by total marks and multiply by 100.
How do I calculate percentage increase?
(New value − old value) ÷ old value × 100.
Is a 10% increase then 10% decrease the same value?
No. 100 → 110 → 99, so you end up 1% lower.
Last updated: 10 November 2026