1. What is a Percentage Change Calculator?

Definition: This calculator measures the percentage difference between an old value and a new value.

Purpose: It helps analyze growth rates, price changes, performance improvements, and other comparative metrics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• New — The current or updated value
• Old — The original or previous value

Explanation: The difference between values is divided by the original value to get relative change, then multiplied by 100 to convert to percentage.

3. Importance of Percentage Change Calculation

Details: Percentage change provides a standardized way to compare changes across different scales and magnitudes, making it essential for financial analysis, scientific research, and business metrics.

4. Using the Calculator

Tips: Enter both old and new values. The calculator handles positive and negative values automatically. Division by zero is prevented.

5. Frequently Asked Questions (FAQ)

Q1: What does a negative percentage change mean?
A: A negative result indicates a decrease from the old value to the new value.

Q2: How do I interpret a 0% change?
A: This means the new value is identical to the old value (no change occurred).

Q3: What if my old value is zero?
A: Percentage change is undefined when dividing by zero. The calculator will not display a result in this case.

Q4: Can I compare percentage changes across different metrics?
A: Yes, percentage change normalizes differences, allowing comparison between different types of data.

Q5: How is this different from percentage difference?
A: Percentage change compares two values over time, while percentage difference compares two simultaneous values.