What is % of ? =
is what % of ? =
From to , the change is =
with a % discount costs =
This percentage calculator answers the four percentage questions people ask most often. Type in any box and the answer updates instantly — useful for marks, salary increments, price changes, shop discounts and business margins.
Formulas
- X% of Y = X × Y ÷ 100
- X is what % of Y = X ÷ Y × 100
- Percentage change = (new − old) ÷ old × 100
- Price after discount = price − (price × discount ÷ 100)
Examples
15% of 2,000 is 300. 300 is 25% of 1,200. A rise from 500 to 650 is a 30% increase. A 1,500 item with a 20% discount costs 1,200 (you save 300).
Frequently asked questions
How do I calculate my exam percentage?
Use the second row: enter your total marks obtained and the full marks. For example, 540 out of 600 = 90%.
Why is a 50% rise followed by a 50% fall not back to the start?
Because the second percentage is taken from a bigger number. 100 rises 50% to 150, then falls 50% to 75.