Percentage Change Calculator
The Percentage Change Calculator shows how much a value has increased or decreased as a percentage of the original value.
Percentage Change Calculator
What the result means
The result shows the relative change from the original value. A positive result is an increase, a negative result is a decrease.
How to use this calculator
- 1Enter the original value.
- 2Enter the new value.
- 3Press Calculate to see the percentage change.
The formula
The calculation uses a standard, verifiable formula. Here it is in its simplest form.
Percentage Change = ((New − Original) / Original) × 100
What each variable means
| Symbol | Name | Description |
|---|---|---|
| New | New value | The value after the change. |
| Original | Original value | The starting value. |
Step-by-step example
Example: 100 to 150
Original:100New value:150
- 1Change = 150 − 100 = 50
- 2Percentage = 50 / 100 × 100 = 50%
Result
50% increase
What changes the result
- The percentage is relative to the original value.
- A decrease from 100 to 50 is a 50% decrease.
Edge cases to be aware of
Unusual situations handled correctly
- If the original value is 0, percentage change is undefined.
- Equal values result in 0% change.
Common mistakes
Avoid these errors
- Calculating percentage relative to the new value instead of the original.
Assumptions
- The original value is the reference point.
Limitations
- Percentage change can be misleading for very small original values.
Frequently asked questions
What is the difference between percentage change and percentage points?+
Percentage change is relative to the original value. Percentage points measure the absolute difference between two percentages.