How to calculate percentages
Quick answer: To calculate percentages, pick the question and enter the numbers.
- Pick the question. Percent of a number, what percent, change between two numbers, or increase/decrease.
- Enter the numbers. The answer and the working appear as you type.
Quick examples
20% of 150 is 30. 45 out of 60 is 75%. Going from 80 to 100 is a 25% increase. A $50 item with 15% off costs $42.50.
Frequently asked questions
How do I work out percentage change?
(new − old) ÷ old × 100. A negative answer is a decrease.
How do I get marks as a percentage?
Use "X is what % of Y": your marks as X, the total as Y.