Percentage Calculator
Solve any of the four common percentage questions.
Result
30.00
About
What is X% of Y? X is what % of Y? X is Y% of what? Percent change between two numbers? Pick the question and fill in the two known values. The calculator returns the answer with the formula it used.
How to use
- Pick the question you want to answer.
- Fill in the two values you know.
- Read the answer.
FAQ
What's percent change vs percent difference?+
Percent change uses the original number as the base: (new - old) / old. Percent difference uses the average of both: (a - b) / ((a + b) / 2). For most everyday use, you want percent change.