Percentage Increase & Decrease Calculator
Instantly calculate the percentage difference between two values or apply a percentage change to any number.
Percentage Change
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Understanding Percentage Change
Percentage change is a mathematical concept that describes the relative change between an old value and a new value. It is widely used in finance to track stock growth, in retail to calculate discounts, and in science to report experimental variance.
Percentage Change Formula
Percentage Change = ((New Value - Original Value) / Original Value) × 100Examples
Calculating a Price Hike
((50 - 40) / 40) × 100 = 25% Increase. =
Calculating a Discount
((90 - 120) / 120) × 100 = -25% (or 25% Decrease). =
Frequently Asked Questions
What is the formula for percentage increase?
Subtract the original value from the new value, divide by the original value, and multiply by 100.
Can percentage decrease be more than 100%?
No, if a value decreases by 100%, it becomes zero. It cannot decrease by more than its total value in standard arithmetic.