Percent Change
Divide the change by the earlier value. Dividing by the later value gives a different figure, so the base must be the "before".
Your numbers
Change
15.56%
Difference
7,000
What it means
An increase of 15.56%.
Formula
Change = (After − Before) ÷ Before × 100
Percent change is undefined when the starting value is zero — report the absolute increase instead.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| BeforeThe starting value — it goes in the denominator. | 45,000 | 0 and up |
| AfterThe value you ended up with. | 52,000 | 0 and up |
Step by step
Quick reference table
Results when only Before changes and everything else stays put.
| Before | Change (%) | Difference |
|---|---|---|
| 22,500 | 131.11 | 29,500 |
| 33,750 | 54.07 | 18,250 |
| 45,000 | 15.56 | 7,000 |
| 67,500 | -22.96 | -15,500 |
| 90,000 | -42.22 | -38,000 |
What each result means
| Result | At default values |
|---|---|
| Change (%)How far it moved, measured against the before value. | 15.56 |
| DifferenceThe gap between two values — a quantity, not a rate. | 7,000 |
Common mistakes
Percent change is undefined when the starting value is zero — report the absolute increase instead.
Glossary
- Before
- The starting value — it goes in the denominator.
- After
- The value you ended up with.
- Change
- How far it moved, measured against the before value.
- Difference
- The gap between two values — a quantity, not a rate.
Frequently asked questions
Q. How is Percent Change calculated?
Change = (After − Before) ÷ Before × 100 — Divide the change by the earlier value. Dividing by the later value gives a different figure, so the base must be the "before".
Q. Can you walk through an example?
With Before 45,000, After 52,000, the answer is Change 15.56%.
Q. What do I need to enter?
Enter Before, After. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Before moves the answer to Before 22,500 → Change (%) 131.11 and Before 90,000 → Change (%) -42.22. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Percent change is undefined when the starting value is zero — report the absolute increase instead.
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