1. What is Percent Change?

Percent change measures the relative difference between an old value and a new value, expressed as a percentage. It shows how much a quantity has increased or decreased compared to its original value.

2. How Does the Calculator Work?

The calculator uses the percent change formula:

Explanation:

• Positive result indicates an increase
• Negative result indicates a decrease
• Zero means no change

3. Importance of Percent Change Calculation

Details: Percent change is widely used in finance, economics, science, and business to track growth rates, price changes, performance improvements, and other comparative metrics.

4. Using the Calculator

Tips: Enter both old and new values. The old value cannot be zero (division by zero is undefined). Results show the percentage increase or decrease.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percent change and percentage points?
A: Percent change is relative to the original value, while percentage points measure absolute difference between percentages.

Q2: How do I interpret a negative percent change?
A: A negative result means the new value is smaller than the old value (a decrease).

Q3: What if my old value is zero?
A: The calculation is undefined (division by zero). Consider using absolute difference instead.

Q4: Can percent change be more than 100%?
A: Yes, this indicates the new value is more than double the old value.

Q5: How is percent change different from percent difference?
A: Percent change compares two values over time, while percent difference compares two simultaneous measurements.