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
• \( New \) — New value after decrease

Explanation: The formula calculates the relative change from the old value to the new value, showing how much the value has decreased as a percentage of the original.

3. Importance of Percentage Decrease

Details: Percentage decrease is widely used in finance (price drops), business (sales declines), science (reduction in measurements), and everyday life to quantify changes in a standardized way.

4. Using the Calculator

Tips: Enter both old and new values. The old value must be greater than zero. The new value should be less than or equal to the old value for a decrease calculation.

5. Frequently Asked Questions (FAQ)

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

Q2: Can the result be negative?
A: Yes, a negative result indicates a percentage increase rather than decrease (when New > Old).

Q3: How is this different from percentage change?
A: Percentage decrease is one type of percentage change (specifically for reductions), while percentage change can be either increase or decrease.

Q4: What if my old value is zero?
A: The calculation is undefined (division by zero). Percentage decrease cannot be calculated when starting from zero.

Q5: How precise are the results?
A: Results are rounded to 2 decimal places for readability, but maintain higher precision in calculations.