Percentage Calculator
Three everyday percentage questions, answered instantly: a percent of a number, a number as a percent of another, and the percentage change between two values.
What is X% of Y?
% of= -
X is what percent of Y?
is what % of= -
Percentage change
from to = -
How to use
- Pick the question you want to answer.
- Enter the numbers.
- Read the result - the formula used is shown below it.
Examples
What is 20% of 150?
Output: 30. Formula: 150 x 20 / 100.
45 is what percent of 180?
Output: 25%. Formula: 45 / 180 x 100.
From 80 to 100?
Output: +25% increase. Formula: (100 - 80) / 80 x 100.
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = 200 x 15 / 100 = 30.
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100.