Successive Percentage Change Calculator

Model stacked percentage changes step by step instead of incorrectly adding percentages that apply to different bases.

Starting value

Changes

99Final value

−1%Net percent change

−1Net value change

0.99×Combined multiplier

Step	Change	Before	After

Sequential percentages multiply. A 10% increase followed by a 10% decrease returns 99 from 100, not 100.

Apply percentage changes in order

Enter a starting value and signed percentage changes. Positive values increase the current amount and negative values decrease it. Each step uses the result of the previous step as its new base.

Why percentages do not simply add

Successive changes multiply their factors. For example, +10% then −10% gives 1.10 × 0.90 = 0.99, so the net result is −1%, not zero.