How to Calculate Percentage Increase and Decrease
Percentage change tells you how much a value has gone up or down relative to where it started. It is used for prices, marks, salaries, and statistics. Here is the simple formula with examples.
The formula
Percentage change = (new value − old value) ÷ old value × 100. A positive result is an increase; a negative result is a decrease.
Examples
- From 100 to 125: (125 − 100) ÷ 100 × 100 = 25% increase.
- From 80 to 60: (60 − 80) ÷ 80 × 100 = 25% decrease.
- From 50 to 75: (75 − 50) ÷ 50 × 100 = 50% increase.
Check it instantly
Rather than working it out by hand, enter the old and new values and let the calculator do it.
Calculate percentage change now — free:
Open the Percentage Calculator