What Is a Percentage Point?
A percentage point measures the arithmetic difference between two percentages. If a rate rises from 35% to 42%, it increases by 7 percentage points because 42 − 35 = 7.
Percentage points are useful whenever the values being compared are already percentages. You will often see them used for interest rates, survey results, unemployment rates, profit margins, test scores, election polls, and conversion rates.
Percentage Point Formula
Percentage-point change = Ending percentage − Starting percentage
A positive answer means the percentage increased. A negative answer means it decreased. An answer of zero means there was no change.
How to Use the Percentage Point Calculator
- Enter the original rate in the Starting percentage field.
- Enter the new rate in the Ending percentage field.
- Read the main result in percentage points.
- Use the secondary results when you also need relative percent change or basis points.
Enter 35 and 42—not 0.35 and 0.42—when you mean 35% and 42%.
Percentage Points vs. Percent Change
These terms describe the same movement from different perspectives, but they are not interchangeable. Percentage points give the direct gap between two rates. Percent change compares that gap with the starting rate.
| Measure | Formula | 35% to 42% |
|---|---|---|
| Percentage-point change | 42% − 35% | 7 percentage points |
| Relative percent change | (42 − 35) ÷ 35 × 100 | 20% increase |
| Basis-point change | 7 × 100 | 700 basis points |
Saying that 35% rose by 7% would be ambiguous and usually incorrect if you mean the direct difference. The clearest wording is: “The rate rose by 7 percentage points, a 20% relative increase.”
Worked Examples
Example 1: Survey support increases
Support for a proposal rises from 38% to 45%.
45% − 38% = 7 percentage points
The survey result increased by 7 percentage points. Relative to the original 38%, that is an increase of about 18.42%.
Example 2: A conversion rate decreases
A website's conversion rate falls from 12% to 9%.
9% − 12% = −3 percentage points
The conversion rate decreased by 3 percentage points. In relative terms, it fell by 25% because 3 is one quarter of the starting rate of 12.
Example 3: An interest rate changes
An interest rate moves from 4.50% to 5.25%.
5.25% − 4.50% = 0.75 percentage points
The increase is 0.75 percentage points, which is also 75 basis points.
When Should You Use Percentage Points?
Use percentage points when both the starting and ending values are percentages and you want the direct difference between them. This is usually the clearest choice when discussing:
- Interest rates and central-bank policy rates
- Survey and election-poll results
- Unemployment, inflation, or participation rates
- Profit margins and conversion rates
- Test scores expressed as percentages
- Market share and approval ratings
Use relative percent change instead when you need to describe how large the movement is compared with the starting value.
Common Mistakes to Avoid
- Using the percent-change formula: Subtract the two rates when the question asks for percentage points.
- Calling percentage points “percent”: A move from 20% to 30% is 10 percentage points, but a 50% relative increase.
- Ignoring direction: An answer of −4 points means a decrease of 4 percentage points.
- Entering decimal forms: Enter 8.5 for 8.5%, unless the data itself is written as a decimal ratio.
Frequently Asked Questions
What is the difference between 20% and 25%?
The difference is 5 percentage points. Measured relative to the starting value of 20%, it is a 25% increase.
Can a percentage-point change be negative?
Yes. If a rate moves from 60% to 52%, the signed change is −8 percentage points. This is commonly described as a decrease of 8 percentage points.
What does “pp” mean?
“pp” is a common abbreviation for percentage point or percentage points. It distinguishes percentage-point changes from relative percent changes.
How many basis points are in one percentage point?
One percentage point equals 100 basis points. For example, a change of 0.25 percentage points equals 25 basis points.
What happens when the starting percentage is zero?
The percentage-point difference can still be calculated. For example, moving from 0% to 5% is an increase of 5 percentage points. However, the relative percent change is undefined because calculating it would require division by zero.
Are percentage points the same as percent change?
No. If a rate increases from 20% to 30%, the difference is 10 percentage points. Relative to the original 20%, however, that movement is a 50% increase.
Summary
A percentage point is the direct arithmetic difference between two percentages. Subtract the starting percentage from the ending percentage to find the signed change. Positive values indicate an increase, while negative values indicate a decrease.
Remember that percentage points and percent change are different. A move from 35% to 42% is an increase of 7 percentage points, but it is a 20% increase relative to the starting value.
Related Percentage Calculators
Use these calculators for other ways to compare values and percentages:
- Percentage Calculator — solve common percentage problems.
- Reverse Percentage Calculator — work backward from a percentage result to find the original value.
- Fraction Percent Calculator — convert between fractions and percentages.
- Percentage Change Calculator — measure relative percent change instead of percentage-point change.
- Percentage Difference Calculator — measure the relative difference between two values.
- Percent Error Calculator — compare a measured value with an accepted value.