How to use it
- Convert each change to a multiplier.
- Multiply the multipliers.
- Compare the combined multiplier with 1.
See it in action
+20% then −20% gives 1.2×0.8=0.96, a net 4% decrease.
How to verify it
Start with 100: 120 then 96.
Successive Percent Changes Multiply
Repeated percentage changes apply to the updated amount, so they do not simply add.