Enter the required information
Use the fields in the tool above and keep units and formats consistent.
Work out percentages, percentage change, discounts and marks in one place. Clear formulas and examples show exactly how each answer is reached.
Percentage amount
โน10,000
Percentage results are estimates for planning and should be checked against current official rules or professional advice where applicable.
What is 15% of 3,200? What percentage is 18 out of 240? By how much did a price go up? These three questions cover nearly every percentage problem in daily life, from marksheets to salary hikes and shop discounts.
This percentage calculator has a separate box for each type. Fill in the two numbers you know and the third appears instantly. There is no need to remember which number goes on top or whether to multiply by 100 first.
| Question | Formula | Example |
|---|---|---|
| What is X% of Y? | Y ร X รท 100 | 15% of 3,200 = 480 |
| X is what % of Y? | X รท Y ร 100 | 18 of 240 = 7.5% |
| Percentage change | (New โ Old) รท Old ร 100 | Rs 45,000 to Rs 52,000 = 15.56% rise |
| Price after discount | Price ร (100 โ Discount) รท 100 | 20% off Rs 2,499 = Rs 1,999.20 |
| Marks percentage | Marks รท Maximum ร 100 | 438 of 500 = 87.6% |
Notice that percentage change always divides by the old value. Divide by the new value and a 15.56% salary hike shows up as 13.46%. That mistake appears in reports more often than you would expect.
These two terms sound alike but measure different things. A percentage point is the plain difference between two percentages. Percentage change is how much that difference is relative to the starting figure.
Suppose a loan rate moves from 8% to 9%. That is a rise of one percentage point. In relative terms, though, the rate has gone up by 12.5%. News headlines and bank notices sometimes blur this distinction.
The same applies to exam pass rates, inflation and election vote shares. When you quote a change, say which one you mean.
Start with Rs 1,000. A 25% increase takes it to Rs 1,250. A 25% decrease on that new amount removes Rs 312.50. You end at Rs 937.50, not Rs 1,000.
The fall is calculated on a bigger base, so it removes more. This is why a stock that drops 50% needs a 100% gain to recover. It also explains why "flat 50% off plus extra 20% off" means 60% off, not 70%.
For anything messier, a calculator saves a few minutes and a few errors. Students checking marks, shoppers comparing offers and analysts writing reports all hit the same traps. A quick check with the right formula keeps your numbers honest.
Use the fields in the tool above and keep units and formats consistent.
Review the result shown in the output area.
Confirm that the result matches your situation before using it for a decision.
Percentage = Value ร Rate รท 100.This describes the core logic used by the tool. Check any assumptions that may affect your result.
Use accurate inputs and keep units consistent.
Review the assumptions before using the result for a decision.
Compare important results with an independent or official source.
Divide the part by the whole and multiply by 100. For 18 out of 240, that is 18 divided by 240, then multiplied by 100, giving 7.5%. Make sure the whole, or total, always sits in the denominator.
Subtract the old value from the new value, divide by the old value, then multiply by 100. A salary rising from Rs 45,000 to Rs 52,000 is a 15.56% increase. A negative answer means the value has decreased.
Percentage points measure the simple gap between two percentages. A rate rising from 8% to 9% gains one percentage point. As a relative change, that same move is a 12.5% increase, because one is 12.5% of eight.
Divide total marks obtained by maximum marks and multiply by 100. Scoring 438 out of 500 gives 87.6%. Some boards and universities calculate percentage from CGPA using their own conversion factor, so check your board's official rule.
No, stacked discounts apply one after the other. Fifty percent off Rs 1,000 leaves Rs 500, and 20% off that leaves Rs 400. The total saving is 60%, not 70%, because the second discount works on a smaller price.
Divide the sale price by (100 minus the discount) and multiply by 100. If an item costs Rs 1,999.20 after 20% off, the original price was Rs 2,499. This reverse method also works for removing tax from a total.
The gain is calculated on a smaller base after the loss. Rs 1,000 falling 25% becomes Rs 750. Getting back to Rs 1,000 then needs a 33.33% rise. Larger losses need even bigger percentage recoveries.
Explore other useful tools across the site.