1. What is Percentage Decrease?

Percentage decrease measures the reduction in a value relative to its original amount, expressed as a percentage. It's commonly used to track declines in prices, quantities, or performance metrics.

2. How Does the Calculator Work?

The calculator uses the percentage decrease formula:

Where:

• Old — Original value before decrease
• New — Value after decrease

Explanation: The formula calculates the relative change from the old value to the new value, then converts it to a percentage.

3. Importance of Percentage Decrease Calculation

Details: Percentage decrease is widely used in finance, economics, business, and science to quantify reductions in prices, costs, quantities, or performance metrics over time.

4. Using the Calculator

Tips: Enter the original (old) value and the new value. Both must be positive numbers, and the old value must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage decrease and absolute decrease?
A: Absolute decrease is the simple difference (Old - New), while percentage decrease shows this change relative to the original value.

Q2: Can percentage decrease be more than 100%?
A: Yes, if the new value is negative (representing a complete reversal beyond zero), though this is rare in most applications.

Q3: How is percentage decrease different from percentage change?
A: Percentage decrease is one type of percentage change (negative change). Percentage change can be either increase or decrease.

Q4: What does a 0% decrease mean?
A: It means there was no change - the new value is exactly the same as the old value.

Q5: How should I interpret a negative percentage decrease?
A: A negative "decrease" actually indicates an increase in value from old to new.