How to use & example
- Choose the type of percentage calculation you need.
- Enter the two values. Decimals and negative numbers are supported.
- Calculate to see the answer and the formula used.
Example
What is 20% of 150? Multiply 150 by 20 ÷ 100. The answer is 30.
A starting value of zero has no defined percentage change. The result includes the formula so you can check the calculation and understand which value is the starting amount.
Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage, then divide by 100. For example, 15% of 80 is 80 × 15 ÷ 100 = 12.
How is percentage change calculated?
Subtract the original value from the new value, divide by the original value, and multiply by 100. A change from 50 to 60 is a 20% increase. A starting value of zero has no defined percentage change.