120 → 165: 37.5% increase.
Show calculation steps
- 165 − 120 = 45.
- Divide by |120| = 0.375.
- Multiply by 100 = 37.5%.
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How this calculator works
Percentage change is directional: the original value is the baseline, so swapping the old and new values usually produces a different percentage.
PercentScope also shows the absolute difference and a visual old-versus-new comparison so you can interpret the result without doing extra math.
Example: 120 to 165
The increase is 45. Dividing 45 by the original 120 gives 0.375, so the percentage change is a 37.5% increase.
Frequently asked questions
What if the original value is zero?
A standard percentage change is undefined when the original value is zero because the formula would divide by zero.
Is percentage change the same as percentage difference?
No. Percentage change uses the original value as the baseline; percentage difference compares two values symmetrically using their average.