Percentage Points vs Percent: Why 1% Isn’t Always 1%

“The Fed raised rates by 1%” — if you’ve read that headline and then seen “rates went from 2% to 3%,” you may have noticed something odd: 2 to 3 is a 50% jump, not a 1% one. That’s because the headline and the math are using two different units: percentage points and percent. Mixing them up isn’t a grammar quibble — it can genuinely mislead you about loans, savings, and polls.

The Difference in One Sentence

A percentage point is the absolute difference between two percentages. A percent change is the relative difference — how much the original value grew or shrank. Going from 2% to 3% is an increase of 1 percentage point, which equals a 50% increase relative to where you started.

A Concrete Example

Say your savings account pays 2% interest and the bank raises it to 3%. Your rate went up by 1 percentage point. But your interest income just went up by 50% — you’ll earn half again as much as before. Both statements are true; they’re just measuring different things. “The rate rose by 1 percentage point” is precise. “The rate rose by 1%” is ambiguous at best and wrong at worst.

Why the Confusion Is Dangerous

• Loans: A credit card going from 18% to 21% APR is “3 points” — but a 16.7% jump in your interest cost.
• Polls: Approval rising from 40% to 44% is 4 points, often reported as “up 10%” (4 ÷ 40). Both are defensible; only one is usually stated.
• Tax brackets: A bracket moving from 22% to 24% is 2 points — and a 9% increase in that bracket’s rate.
• Investment returns: A fund beating its benchmark by 2 points vs. 2 percent are very different claims.

How to Convert Between Them

Two formulas cover almost every case:

1. Percentage points = new value − old value (e.g., 3% − 2% = 1 point).
2. Percent change = (new value − old value) ÷ old value × 100 (e.g., (3−2) ÷ 2 × 100 = 50%).

Quick Reference Table

From	To	Percentage Points	Percent Change
2%	3%	+1	+50%
5%	6%	+1	+20%
10%	15%	+5	+50%
40%	44%	+4	+10%
50%	25%	−25	−50%

Notice the pattern: the same 1-point move can be a 50% change or a 5% change depending on the starting value. That’s why headlines should always say “points” when they mean points.

Do the Math Instantly

If you need to compute a percentage increase, decrease, or find what percentage one number is of another, the free Percentage Calculator does it in one click — including the percent-change calculation that trips up most people.