Percentage calculator
Find a percent of a number, what percent one number is of another, the change between two numbers, or add and subtract a percent.

Details
Find a percent of a number, what percent one number is of another, the change between two numbers, or add and subtract a percent. Division by zero returns 0 and is labeled. This is not a statistics package.

Category: Everyday
Page: /tools/percentage-calculator
Text: /tools/percentage-calculator.txt

Limits
Division by zero returns 0 and is labeled. This is not a statistics package.

Steps
1. Pick the question.
2. Enter the numbers.
3. Read the result.

Questions
How is percent change signed?
An increase is positive. A decrease is negative.

Is 20% off the same as 80% of?
Yes, and both are available.

Are results rounded?
They are shown with up to four decimal places.