Percent change vs percentage points
These phrases sound interchangeable. They are not — and mixing them up can reverse the story a number is telling.
People say “percent,” “percentage,” and “percentage points” in casual conversation as if they were the same unit. In careful writing — interest rates, election polls, tax rates, and grade weights — the distinction matters.
Percentage points: the absolute gap
A percentage point is the arithmetic difference between two percentages. If an interest rate moves from 4% to 6%, that is an increase of 2 percentage points. You subtract: 6 − 4 = 2.
Percentage points answer: “How far apart are these two rates on the percent scale?”
Percent change: the relative move
Percent change (also called relative percent change) asks how large the move is compared with the starting value:
percent change = (new − old) ÷ old × 100
From 4% to 6%: (6 − 4) ÷ 4 × 100 = 50% increase. The rate rose by half of its former level, even though it only moved two points on the scale.
Why headlines get confusing
Saying “rates rose 50%” when someone means “rose two percentage points from 4 to 6” exaggerates the everyday meaning of a two-point hike. Saying “rose 2%” when the rate went from 4 to 6 understates the move. Precise language prevents both errors.
Worked examples
- Polls: Support moves from 40% to 45%. That is +5 percentage points, or a 12.5% relative increase in the share.
- Discounts: A price falls from $80 to $60. That is a 25% decrease (percent change), not “20 percentage points” — prices are not percentages unless stated that way.
- “X% of Y”: Finding 15% of 200 is a different task entirely (answer: 30). Use the modes on our percentage calculator that match your question.
Quick checklist
- Are both numbers already percentages? If yes, the raw difference is in percentage points.
- Do you need growth relative to the start? Use percent change.
- Are you taking a percent of a quantity? That is neither “points” nor “change” — it is part-of-whole.
Bottom line
Percentage points measure distance on the percent scale. Percent change measures relative size of a move. Name which one you mean, and your reader (or your future self) will trust the number. Tools on this site are for education and quick checks, not formal reporting advice.