Percentage Change Calculator — Formula
## How to Calculate Percentage Change
### Formula
**% Change = [(New - Old) / |Old|] * 100**
Percentage change measures the relative difference between two values. A positive result indicates an increase; negative indicates a decrease. Using the absolute value of the old value in the denominator handles cases where the old value is negative.
### Formula
**% Change = [(New - Old) / |Old|] * 100**
Percentage change measures the relative difference between two values. A positive result indicates an increase; negative indicates a decrease. Using the absolute value of the old value in the denominator handles cases where the old value is negative.
Exemplo Resolvido
A price changes from $80 to $100.
- Change = 100 - 80 = 20
- % Change = (20 / 80) * 100 = 25%
- Ratio = 100 / 80 = 1.25
- The price increased by 25%