Percentage Point
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A percentage point (pp) is the arithmetic difference between two percentage values. If a central bank raises its benchmark rate from 3% to 5%, the increase is 2 percentage points. This is a unit of measurement, not a relative change. It is distinct from saying the rate increased "by 2%" - that phrasing would mean 2% of the original 3%, which equals 0.06 percentage points, a fundamentally different magnitude.
The confusion between percentage points and percentage change is pervasive in journalism, politics, and business reporting, and it materially changes the meaning of a statement. An interest rate rising from 1% to 2% is a 1 percentage point increase but a 100% relative increase. Whether you use percentage points or percentage change can make the same event appear trivially small or dramatically large.
Percentage points are dimensionless and absolute - they represent the raw difference on the percentage scale. They are most useful when the underlying percentages are of the same type and are being compared directly, such as comparing rates across time or groups.
When to use Percentage Point
Use percentage points when you want to express the arithmetic gap between two percentage values without implying a relative magnitude. Use percentage change when expressing how much one percentage has grown or shrunk relative to its own original level. Ideally, report both for full context.
Worked examples for Percentage Point
This table quickly gives you the overview you need to understand Percentage Point and its most important comparisons.
| Metric | Before | After | Change (pp) | Relative change |
|---|---|---|---|---|
| Unemployment rate | 4.0% | 6.5% | +2.5 pp | +62.5% |
| Approval rating | 58% | 51% | −7 pp | −12.1% |
| Market share | 22% | 28% | +6 pp | +27.3% |
| Mortgage rate | 2.5% | 5.0% | +2.5 pp | +100.0% |
| Exam pass rate | 71% | 68% | −3 pp | −4.2% |
Common pitfalls
The most dangerous misuse is in media and political communication. Saying an interest rate "increased by 2%" when it rose from 3% to 5% is ambiguous at best. Almost all readers interpret it as a 2 percentage point increase. Use "percentage points" explicitly whenever you mean an absolute difference between two percentages.
Frequently asked questions about Percentage Point
Is "basis point" the same as "percentage point"?
No. One basis point equals 0.01 percentage points, or one-hundredth of a percent. A 25 basis point rate increase equals a 0.25 percentage point increase. Basis points are the standard unit in fixed income and monetary policy precisely because they avoid percentage-vs-percentage-point ambiguity.
How do I convert a percentage point change to a relative percentage change?
Divide the percentage point change by the original percentage and multiply by 100. If unemployment rises 2.5 pp from 4.0%, the relative change is (2.5 / 4.0) × 100 = 62.5%.
When should I report percentage points vs. percentage change?
For policy rates, exam pass rates, and survey percentages - where absolute shifts matter - percentage points are clearer. For revenue growth, population growth, or any metric where scale matters - percentage change is more informative. Ideally, report both: "the pass rate fell 3 percentage points (−4.2%)."
Quiz: how well do you know percentage points?
1. What does a percentage point (pp) measure?
2. An interest rate rises from 1% to 2%. Which pair of statements is correct?
3. From the examples table, the unemployment rate rises from 4.0% to 6.5%. What is the relative (percentage) change?
4. What does the pitfalls section identify as the most dangerous misuse of percentage language?
5. How many basis points equal one percentage point?