Percentage vs Percentage Point: What's the Difference?
When a value changes from 5% to 8%, journalists and analysts can describe this in two ways: "a 60% increase" (relative percent change) or "a 3 percentage point increase" (absolute difference). Both are mathematically correct — they describe different aspects of the same change.
The distinction matters enormously. Confusing the two can mislead. A headline saying "crime fell 50%" sounds dramatic. If the crime rate went from 2% to 1%, the relative change is 50% but the absolute change is only 1 percentage point. Understanding which measure is reported is critical for informed decision-making.
| Property | Percentage Change (Relative) | Percentage Points (Absolute) |
|---|---|---|
| Formula | ((New% − Old%) / Old%) × 100 | New% − Old% |
| Type of measure | Relative / proportional | Absolute / arithmetic |
| Unit | % (a ratio) | pp (a difference of rates) |
| Depends on starting value? | Yes — divides by Old% | No — just subtraction |
| Example: 5% → 8% | (8−5)/5 × 100 = 60% | 8 − 5 = 3 pp |
| Example: 40% → 50% | (50−40)/40 × 100 = 25% | 50 − 40 = 10 pp |
| Better for comparing rate changes | When starting values differ widely | When absolute magnitude matters |
| Used in finance | Stock returns, % growth | Interest rate moves (also basis points) |
| Used in polling | Occasionally, but less common | Standard — e.g. "lead of 5 pp" |
| Risk of misuse | Can exaggerate small absolute changes | Can understate large relative changes |
Finance Examples
Interest rates: The Bank of England raises the base rate from 4.75% to 5.00%. This is a 25 basis point (0.25 pp) increase. The relative percent change is (0.25/4.75) × 100 = 5.26%. Finance professionals always quote the pp change (or bps) — not the relative change — because the absolute move matters for loan costs.
Savings accounts: A bank raises savings rates from 3.5% to 4.2%. That is 0.7 percentage points (70 basis points) more. The relative increase is 20%. Both are useful: the relative change compares how much better the rate is; the pp change shows the extra annual income per £100 invested (£0.70/year per £100).
Inflation: CPI rises from 2.1% to 3.5%. Absolute: 1.4 percentage points higher. Relative: 66.7% higher. Headlines saying "inflation surged 67%" are technically correct but can be misleading about the real-world impact.
Polling and Election Examples
Candidate support: Party A's polling support rises from 38% to 43%. That is 5 percentage points, not 5%. The relative change is 13.2%. In elections, pp is always the correct unit — "the party gained 5 points."
Margin of error: A poll reports "±3 percentage points." This means the true support level could be 3 pp above or below the stated figure. It does NOT mean ±3% relative to the stated figure.
Approval ratings: A politician's approval falls from 55% to 44%. Absolute: −11 percentage points. Relative: −20%. Journalists typically report "approval fell 11 points" (pp), not "approval fell 20%."
Common Media Misuse
Ambiguous "percent": A headline reads "unemployment rose 10%." Does this mean from 5% to 5.5% (10% relative) or from 5% to 15% (10 pp)? Without clarification, this is ambiguous. Good journalism specifies which measure is used.
Exaggerating small changes: "Tax rate doubled" — if it went from 0.5% to 1.0%, that is 0.5 pp and 100% relative. The relative change sounds dramatic; the absolute change is tiny.
Minimising large changes: "Market share rose 3 percentage points" — if it went from 3% to 6%, the relative change is 100% (doubled). Reporting only pp obscures the proportional significance.
Best practice: Report both when the distinction is important. "The unemployment rate fell from 6% to 4%, a 2 percentage point decrease (or 33% relative decline)." This gives readers both the absolute change and its proportional context.
When to Use Each Measure
Use percentage points when: Comparing two rates directly (interest rates, tax rates, polling shares). Reporting changes in rates or proportions where the absolute move matters. Communicating to a general audience that includes non-specialists. This is the default in finance, economics, and polling.
Use relative percent change when: Comparing changes where starting values differ widely (one rate was 1%, another was 10%). Measuring economic growth, returns, or performance. Expressing how much larger or smaller one rate is relative to another. Used in academic research and financial performance reporting.
Use both: Whenever the message could be misunderstood with just one measure. State the pp change for the absolute move and the relative change for proportional context.
Verdict
Percentage points measure absolute difference between two rates (simple subtraction). Relative percent change measures how large the move is relative to the starting level. Neither is wrong — they answer different questions. Percentage points are the standard in finance, economics, and polling.
- ✓From 5% to 8%: absolute change = 3 percentage points; relative change = 60%.
- ✓Percentage points do not depend on the starting value; relative % change does.
- ✓Finance uses basis points (1 pp = 100 bps) for precision.
- ✓In polls and elections, always use percentage points — not relative percent.
- ✓When reporting, specify "percentage points" or "%" explicitly to avoid ambiguity.