How to use the Percentage Calculator
- Choose the question you want to answer.
- Enter X and Y.
- Read the answer straight away.
How it's calculated
Show the formula
X% of Y = X ÷ 100 × Y
X is what % of Y = X ÷ Y × 100
% change = (Y − X) ÷ X × 100
X is what % of Y = X ÷ Y × 100
% change = (Y − X) ÷ X × 100
Use it for discounts, exam marks, salary raises, or how much a price went up.
Worked example
These are the example numbers the calculator opens with. Change any of them above to see your own result.
You enter
| What do you want? | X% of Y |
|---|---|
| X | 15 |
| Y | 8,000 |
You get
| 15% of 8,000 | 1,200 |
|---|
Tips
- “Percent” means “per hundred”, so 15% is 15 out of 100.
- For a price rise, use % change from the old price to the new one.
Frequently asked questions
How do I calculate 15% of 8,000?
Multiply 8,000 by 0.15 to get 1,200.
How do I find a percentage of marks?
Divide marks obtained by total marks and multiply by 100. The Marks Percentage calculator also gives your grade.
What is the difference between percentage and percentage points?
If a rate moves from 10% to 12%, it rose by 2 percentage points, which is a 20% increase.