Percentage Increase / Decrease Calculator.
Use this percentage increase/decrease calculator to instantly calculate the percentage change between two values. Simply enter the original value and the new value to see whether the change is an increase or a decrease, along with the percentage difference and numerical change.
Use this percentage increase/decrease calculator to quickly work out the percentage change between two values. Enter the original value and the new value to see whether it’s an increase or decrease, along with the percentage change and the difference.
This calculator works by comparing an original value with a new value and measuring the change relative to the original. The result is expressed as a percentage, making it easy to understand the size of the increase or decrease.
If the new value is higher than the original, the result is shown as a percentage increase. If the new value is lower, the result is shown as a percentage decrease.
Percentage Increase and Decrease Formula
The percentage increase or decrease is calculated using the following formula:
Percentage change = ((New value − Original value) ÷ Original value) × 100
This formula shows how much the value has changed compared to the original amount. A positive result means an increase, while a negative result indicates a decrease.
How to Calculate Percentage Increase
To calculate a percentage increase:
- Subtract the original value from the new value.
- Divide the result by the original value.
- Multiply by 100
For example, if a value increases from 100 to 125, the percentage increase is 25%.
How to Calculate Percentage Decrease
To calculate a percentage decrease:
- Subtract the new value from the original value.
- Divide the result by the original value
- Multiply by 100
For example, if a value decreases from 200 to 150, the percentage decrease is 25%.
When to Use a Percentage Increase or Decrease Calculator
A percentage increase/decrease calculator is useful in many real-world situations, including:
- Tracking price changes
- Calculating discounts or mark-ups
- Measuring growth or decline in sales
- Comparing financial or statistical data
- Analysing performance changes over time
Frequently Asked Questions
What is a percentage change?
Percentage change shows how much a value has increased or decreased compared to its original amount, expressed as a percentage.
What’s the difference between percentage change and difference?
The difference is the numerical change between two values. The percentage change shows the difference relative to the original value.
Can the percentage change be calculated from zero?
No. Percentage change cannot be calculated when the original value is zero because dividing by zero is undefined.
Can I calculate negative values?
Yes. The calculator supports both positive and negative numbers.