Percentage Change Calculator example 1
Input
100 and 120
Output
20% increase
Shows how much the new value increased relative to the starting value.
Calculators
Review practical Percentage Change Calculator examples so you can understand expected input, output, and common patterns faster.
Use this percentage change calculator to measure how much a value has increased or decreased relative to its starting point. It is useful for prices, traffic, sales, metrics, performance tracking, and any situation where the relative change matters more than the raw numeric difference.
Example pages are especially useful for calculators because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.
Input
100 and 120
Output
20% increase
Shows how much the new value increased relative to the starting value.
Input
80 and 60
Output
25% decrease
Useful when checking a drop from the original value.
Fix: Start with the original value and then enter the new value.
Fix: Use a standard percentage calculator if you are not comparing two time-based or before/after values.
Fix: Use a different method when the starting value is zero, because standard percentage change is not defined in the usual way.
After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.
Open the main Percentage Change Calculator page and test your own real input.