1. What is Percentage Decrease?

Definition: Percentage decrease measures the reduction in a value compared to its original amount, expressed as a percentage.

Purpose: It helps quantify changes in prices, quantities, measurements, or any numerical values over time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The difference between old and new values is divided by the old value, then multiplied by 100 to convert to percentage.

3. Importance of Percentage Decrease

Details: This calculation is essential for financial analysis, sales tracking, performance measurement, and statistical comparisons.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What does a negative percentage decrease mean?
A: A negative result indicates a percentage increase rather than decrease (when new value is greater than old value).

Q2: How is this different from percentage difference?
A: Percentage decrease specifically measures reduction from original value, while percentage difference compares two values without directionality.

Q3: What's the maximum possible percentage decrease?
A: The maximum is 100%, which occurs when the new value reaches zero.

Q4: Can I use this for percentage change between any two numbers?
A: Yes, but the result will show decrease (positive) or increase (negative) depending on the values.

Q5: How precise are the results?
A: Results are shown with 2 decimal places for percentage values.