How to use
- Choose what you want to find.
- Enter the values of A and B.
- The answer appears instantly, along with a sentence explaining it.
Formula
A% of B = A × B ÷ 100
A is what % of B = A ÷ B × 100
% change = (B − A) ÷ A × 100
Frequently asked questions
How do I calculate marks percentage?
Choose "A is what % of B", enter your marks as A and the total marks as B. For example, 450 out of 500 is 90%.
How do I find a percentage increase?
Choose "% change from A to B", enter the old value as A and the new value as B. A negative result means a decrease.
Can I use decimals?
Yes, both A and B can be decimals or negative numbers.