How to Calculate Percentage Increase
Learn the percentage increase formula, see a worked example, and jump into the CalcBeacon calculator.
Overview
Percentage increase shows how much a new value has grown compared with the starting value. It is useful for prices, wages, sales, traffic, and many everyday comparisons.
The formula
Percentage increase = ((new value − original value) ÷ original value) × 100
Worked example
If a monthly bill rises from £80 to £100, the increase is £20. Divide £20 by £80 and multiply by 100. The result is 25%.
Why this calculation matters
This calculation helps you compare changes fairly. A £20 increase is not equally important on a small number and a large number, so percentage increase gives proper context.
Quick steps
- Write down the original value.
- Write down the new value.
- Subtract the original value from the new value.
- Divide the difference by the original value.
- Multiply by 100.
Try the matching tool
Use the live calculator for a faster answer after reading the guide.
FAQ
That means the new value is lower than the original value, so you are looking at a percentage decrease instead.
Yes. It works for pay rises, sales growth, traffic growth, and most similar comparisons.
Because the percentage is measured against the starting point, not the new value.
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