Percentage Increase Calculator

What “Percentage Increase” Means

A percentage increase tells you how much something grew, compared to where it started. That comparison is the whole point: going up by 12 is a big jump from 80, but barely noticeable from 8,000. So instead of the raw change, we measure the change as a fraction of the original amount and turn it into a percent.

The bars under the calculator show it: the original value, then the new value with the extra part highlighted in green. That green slice, measured against the original, is the increase.

Percentage Increase Formula

Use this formula when a value goes up:

$$\text{percentage increase} = \frac{\text{new} - \text{original}}{\text{original}} \times 100$$

The original value must not be zero because the change is being compared to the starting amount.

Worked Examples

Original	New	Change	Percentage increase
100	125	25	25%
40	50	10	25%
80	92	12	15%
250	300	50	20%

Where Percentage Increase Helps

• Price increases.
• Salary or allowance increases.
• Growth in savings or investment value.
• Test score improvement.
• Population or traffic growth.

Step-by-Step Example

A price rises from 80 to 92.

1. Subtract: 92 - 80 = 12.
2. Divide by the original value: 12 / 80 = 0.15.
3. Multiply by 100: 0.15 x 100 = 15%.

The percentage increase is 15%.

FAQ

Is percentage increase the same as adding a percent?

Not exactly. Percentage increase compares the change to the original value. Adding 20% to 50 gives 60, and the increase from 50 to 60 is 20%.

What if the new value is smaller?

Use the percentage decrease calculator instead.