Percentage Decrease Calculator

Calculate percentage decrease from original to new value. Find the percent reduction between two numbers.

Original Value

New Value

Tab to move between fields

Decrease

Percentage Decrease

20%

How to Use This Calculator

Enter the Original Value (the starting amount before the decrease).
Enter the New Value (the amount after the decrease).
Percentage Decrease = ((Original − New) / Original) × 100; the result is always expressed as a positive number.
Amount Decreased shows the raw reduction; Remaining Percentage shows what fraction of the original remains.
Use this for markdowns, weight loss, sales declines, or any scenario where a quantity falls.
Original Value must be non-zero; both inputs should be positive for a conventional decrease.

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