Want to calculate the percentage change going from one number to another number? Cool, try this percentage change calculator.

About This Calculator

This calculator calculates the percentage CHANGE when going from one number to another number. If you are looking for more percentage calculators, or want to read a more in depth discussion about percentages, try the Percentage Calculator.

How to Calculate Percentage Change

As an example of how to calculate a percentage change, let's suppose you're interested in calculating the percentage change when going from 12 to 15. When calculating percentage change you need to first establish what the "old" number is that you are starting from (in this case it's 12) and what the "new" number is that you are ending up with (in this case it's 15). Once you've established which number is the "old" number and which number is the "new" number, subtract the old number from the new number and divide the result by the old number, then multiply by 100%. If your answer is positive then it's a percent increase, and if your answer is negative then it's a percent decrease. Here's what the calculation looks like:

For an example in which the answer is a percent decrease, let's calculate the percentage change when going from 25 to 20. Here's what the calculation looks like: