Percentage Increase Calculator
Calculate the percentage increase or decrease between two values.
Starting value before the increase.
Value after the increase.
Percentage increase
25%
Percent gain relative to the original value.
New / final value
100
Value after the increase.
Original value
80
Increase amount
20
Growth multiple
1.25×
Mode
Original value to new value
Formula used
Percentage Increase = (New Value − Original Value) ÷ Original Value × 100
(100 − 80) ÷ 80 × 100
Percentage Increase Formulas
Increase Amount
Increase Amount = New Value − Original Value
Percentage Increase
Percentage Increase = (New Value − Original Value) ÷ Original Value × 100
New Value After Increase
New Value = Original Value × (1 + Percentage Increase ÷ 100)
Reverse Original Value
Original Value = New Value ÷ (1 + Percentage Increase ÷ 100)
Growth Multiple
Growth Multiple = New Value ÷ Original Value
Variable Explanations
Original value
Starting value before the increase.
New value
Value after the increase.
Increase amount
New value minus original value.
Percentage increase
Increase amount as a percent of the original value.
Growth multiple
New value divided by original value.
Reverse increase
Finding the original value from the final value.
What Percentage Increase Means
Relative gain
Percentage increase measures how much a value rose relative to its starting point.
Original is the base
The original value is the denominator in the formula.
Growth factor
A 25% increase means the new value is 125% of the original.
Everyday use
Common in prices, salaries, investments, traffic, statistics, and growth rates.
Not percentage points
Percentage increase is not the same as adding percentage points.
Decrease check
If the new value is lower, the change is a decrease.
Worked Examples
Increase from 80 to 100
Formula: (100 − 80) ÷ 80 × 100
Answer: 25%
The value rose by 20, which is 25% of 80.
Increase from 200 to 250
Formula: (250 − 200) ÷ 200 × 100
Answer: 25%
The increase amount is 50.
New value after 15% increase from 120
Formula: 120 × (1 + 15 ÷ 100)
Answer: 138
A 15% increase means the final value is 115% of the original.
Original from final 150 after 25% increase
Formula: 150 ÷ 1.25
Answer: 120
Reverse increase divides by the growth factor.
Increase amount and growth multiple
Formula: 100 to 140
Answer: Increase = 40, growth multiple = 1.4×
The new value is 1.4 times the original.
New value lower than original
Formula: 80 compared with 100
Answer: 20% decrease
This is not an increase.
20% increase then 20% decrease
Formula: 100 → 120 → 96
Answer: Not back to 100
The second percent uses a different base.
Decimal value example
Formula: (15 − 12.5) ÷ 12.5 × 100
Answer: 20%
Decimals work the same way.
Percentage Increase vs Percentage Change
Percentage increase
Percentage increase is a positive percent gain when the new value is higher than the original. Example: 80 to 100 is a 25% increase.
Percentage change
Percentage change can be positive or negative. Example: 100 to 80 is a 20% decrease because the base is now 100.
Reverse Percentage Increase
Reverse percentage increase finds the original value before an increase. Do not simply subtract the percentage from the final value. If 150 is the value after a 25% increase, then 150 is 125% of the original. Original value = 150 ÷ 1.25 = 120.
Common Use Cases
Common Percentage Increase Mistakes
Understanding Your Results
Percentage increase
Percent gain relative to the original value.
Increase amount
Absolute amount gained.
New value
Value after the increase.
Growth multiple
How many times larger the new value is than the original.
Reverse original value
Estimated starting value before the increase.
Frequently Asked Questions
Related tools