Percentage change calculator
Take the old number from the new one, divide by the old number and multiply by 100. A bill going from £120 to £138 is a 15% increase.
Increase
- Difference
- 18
- New ÷ old
- 1.15×
From 120 to 138 is an increase of 15%, or 18.
A minus figure is a decrease.
Pay rises in pounds
New yearly salary after a percentage rise, before tax.
| Salary | 2% rise | 3% rise | 4% rise | 5% rise | 10% rise |
|---|---|---|---|---|---|
| £25,000 | £25,500 | £25,750 | £26,000 | £26,250 | £27,500 |
| £30,000 | £30,600 | £30,900 | £31,200 | £31,500 | £33,000 |
| £35,000 | £35,700 | £36,050 | £36,400 | £36,750 | £38,500 |
| £40,000 | £40,800 | £41,200 | £41,600 | £42,000 | £44,000 |
| £50,000 | £51,000 | £51,500 | £52,000 | £52,500 | £55,000 |
How we calculate this
We take the old number away from the new one to get the change, then divide by the old number to see how big it is compared with where you started.
Percentage change always compares with the old number. That’s why a 50% fall followed by a 50% rise doesn’t get you back to where you began.
Questions people ask
How do I work out a percentage increase?
Subtract the old number from the new one, divide by the old number and multiply by 100. From £200 to £230 is 30 ÷ 200 × 100 = 15%.
How do I work out a percentage decrease?
The same way. The answer comes out negative: from £80 to £60 is −20 ÷ 80 × 100 = −25%, a 25% decrease.
What’s the difference between percentage change and percentage points?
If an interest rate goes from 4% to 5%, that is a rise of 1 percentage point but a 25% increase in the rate itself.
Has my pay kept up with prices?
Compare your percentage pay rise with inflation over the same year. If your pay rose by less than inflation, it buys less than it did.
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