Percentage Points vs Percent: What's the Difference (and Why It Matters)?

"Interest rates rose 1%." "Support climbed 3 points." "Unemployment fell by 10 percent." Sentences like these appear in the news every day, and they are often ambiguous or simply wrong. The difference between percentage points and percent is small in wording but large in meaning. Once you understand it, you will read statistics more accurately and write them more clearly.

The short answer

• A percentage point is the simple arithmetic difference between two percentages.
• A percent change is that difference measured relative to the starting percentage.

If a rate goes from 10% to 12%:

• It rose by 2 percentage points (12 − 10).
• It rose by 20 percent ((12 − 10) ÷ 10 × 100).

Both statements are true. They answer different questions.

Why the distinction matters

Imagine a loan rate that rises from 2% to 3%. Saying "rates rose 1%" sounds minor. But in relative terms, the rate went up by 50 percent, and interest costs on a new loan at that rate are half again as large. Saying "rates rose 1 percentage point" is precise; saying "rates rose 50%" captures the relative impact. Saying "rates rose 1%" is ambiguous, because it could mean either.

The same issue appears everywhere:

• Test scores. Going from 60% to 75% correct is a 15-point gain and a 25% improvement.
• Polls. A candidate moving from 40% to 44% gained 4 points, which is a 10% increase in their share.
• Market share. A company going from 5% to 6% of a market gained 1 point but grew its share by 20%.
• Risk. A risk going from 1 in 100 to 2 in 100 doubles (a 100% increase), while rising only 1 percentage point.

That last example is why health headlines can sound alarming or reassuring depending on which figure they lead with. Ideally, good reporting gives both the absolute and the relative change.

How to calculate each

Let the old percentage be A and the new percentage be B.

• Change in percentage points = B − A
• Percent change = (B − A) ÷ A × 100

Example: a savings rate moves from 4.5% to 3.6%.

• Percentage points: 3.6 − 4.5 = −0.9 points
• Percent change: −0.9 ÷ 4.5 × 100 = −20%

So the rate fell by 0.9 percentage points, which is a 20% decrease in the rate itself. For the full method, read our guide to the percentage change formula, or use the percent increase calculator.

Basis points: the finance version

In finance, small rate changes are often measured in basis points. One basis point is one hundredth of a percentage point:

• 1 percentage point = 100 basis points
• 0.25 percentage points = 25 basis points

So when a central bank raises a rate "by 25 basis points", it means a quarter of a percentage point, such as from 4.00% to 4.25%. Basis points exist precisely to avoid the percent vs percentage point confusion.

Common mistakes to avoid

• Writing "%" when you mean points. If something went from 20% to 25%, write "rose 5 percentage points" or "rose to 25%", not "rose 5%".
• Comparing relative changes of tiny numbers. A jump from 0.1% to 0.2% is a 100% increase but only 0.1 points. Both facts matter for interpretation.
• Mixing the two in one sentence. "Sales rose 10% while margin rose 2%" is confusing if margin is itself a percentage. Say "margin rose 2 points".
• Averaging percentages blindly. If groups are different sizes, a simple average of their percentages can mislead. Weight by group size.

Discounts are different

With shopping discounts, "percent" usually means percent of the price, not percentage points. "20% off, then an extra 10% off" means two separate percentage reductions applied one after the other:

• Price × 0.80 × 0.90 = price × 0.72, which is 28% off in total.

Percentage points do not come into it, because the price is not a percentage. Our discount guide has more examples.

How to write about percentages clearly

If you write reports, homework, articles or presentations, these habits help readers:

1. State both values. "The rate moved from 4% to 5%" leaves no room for confusion.
2. Use "percentage points" for differences between percentages.
3. Use "percent" for relative change and say what it is relative to.
4. Give absolute numbers when possible. "From 40 to 44 out of 100 respondents" is concrete.
5. Be consistent. Choose a convention and stick with it throughout.

A quick self-test

Try these before checking the answers.

1. Turnout went from 50% to 60%. How many points, and what percent change?
2. A fee went from 3% to 2.4%. How many points, and what percent change?
3. A rate rose by 50 basis points from 5%. What is the new rate?

Answers: (1) 10 points, a 20% increase. (2) −0.6 points, a 20% decrease. (3) 5.5%.

For any of these calculations, the Percentage Lab calculator gives instant results, including what percent one number is of another.

Frequently asked questions

What is a percentage point?

A percentage point is the simple difference between two percentages. Going from 10% to 12% is a rise of 2 percentage points.

Is a 1 percentage point increase the same as a 1% increase?

No. A 1 percentage point increase from 10% gives 11%. A 1% increase from 10% gives 10.1%.

How many basis points are in a percentage point?

There are 100 basis points in one percentage point, so 25 basis points equals 0.25 percentage points.

When should I use percentage points?

Use percentage points whenever you describe the difference between two values that are already percentages, such as rates, shares or scores.

Why do news reports sometimes use percent instead of percentage points?

Sometimes it is a mistake, and sometimes the relative change is the point. Look for both starting and ending values to interpret it correctly.

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