1. What is Percent Decrease?

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

2. How Does the Calculator Work?

The calculator uses the percent decrease formula:

Where:

• Old Value — The original or starting value
• New Value — The current or reduced value

Explanation: The formula calculates what percentage of the original value has been lost in the decrease.

3. Importance of Percent Decrease Calculation

Details: Percent decrease is widely used in finance (price reductions), business (sales declines), science (concentration changes), and everyday life to quantify changes.

4. Using the Calculator

Tips: Enter both old and new values. The old value must be greater than zero. The calculator will show the percentage decrease between the two values.

5. Frequently Asked Questions (FAQ)

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

Q2: Can percent decrease be more than 100%?
A: Yes, if the new value is negative (which would represent more than 100% decrease from the original positive value).

Q3: How is percent decrease different from percent change?
A: Percent decrease only measures reductions, while percent change can be positive (increase) or negative (decrease).

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

Q5: How do I interpret a negative percent decrease?
A: A negative result actually indicates a percent increase rather than a decrease.