How do you calculate percentage decrease?

Subtract the new value from the original value, divide by the original value, and multiply by 100.

What if the original value is zero?

Percentage decrease cannot be calculated when the original value is zero because division by zero is undefined.

Percentage Decrease Calculator

Q: Can percentage decrease be negative?

If the result is negative, it represents a percentage increase instead.

Instantly calculate reduction between two values

💡 Enter the original value and the new value to calculate percentage decrease. Everything runs locally in your browser.

Decrease: —

Examples:

• Price drops from 100 to 80 → Decrease = 20%
• Value falls from 500 to 400 → Decrease = 20%

What is percentage decrease?

Percentage decrease measures how much a value has dropped relative to its original amount. It is widely used for discounts, depreciation, financial losses, and performance analysis.

Formula

(Original − New) ÷ Original × 100

Frequently Asked Questions

Can percentage decrease be negative?

If the value increases, the result becomes a percentage increase instead.

What if original value is zero?

Percentage decrease cannot be calculated because division by zero is undefined.

Where is percentage decrease used?

Sales discounts, price reductions, financial losses, statistics, and depreciation calculations.