Percentage Change (Increase / Decrease)
Calculate the percentage increase or decrease between two values.
Enter the old and new value; we'll calculate the percentage change between them.
Result
25
Percentage increase: 25%
Result in all units
Step-by-step solution
What Is Percentage Increase / Decrease?
Percentage change shows how much a value has increased or decreased relative to its original value, expressed as a percentage. It is used for raises, inflation, and price changes.
How is it calculated?
How to Calculate?
Change (%) = ((new − old) ÷ old) × 100
- Enter the old and new value.
- A positive result means an increase, a negative one means a decrease.
For example, 80 → 100: a 25% increase.
Frequently Asked Questions
Does a 20% raise then a 20% discount return to the original price?
No; because they apply to different bases, the price ends up 4% below the original (1.2 × 0.8 = 0.96).