1. What is Percentage Change?

Percentage change measures the relative difference between an old value and a new value, expressed as a percentage. It is commonly used in finance, economics, statistics, and everyday life to track growth, decline, or variation over time.

2. How Does the Calculator Work?

The calculator uses the percentage change formula:

Where:

• \( New\ Value \) — The current or final value
• \( Old\ Value \) — The original or initial value

Explanation: A positive result indicates an increase, while a negative result indicates a decrease. The formula calculates the relative change compared to the original value.

3. Importance of Percentage Change Calculation

Details: Percentage change is essential for analyzing trends, comparing performance, making investment decisions, tracking growth rates, and understanding market fluctuations across various fields.

4. Using the Calculator

Tips: Enter both old and new values. The old value cannot be zero as division by zero is undefined. Values can be positive or negative numbers representing any measurable quantity.

5. Frequently Asked Questions (FAQ)

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

Q2: How is percentage change different from percentage difference?
A: Percentage change compares two values over time (old vs new), while percentage difference compares two different values at the same time point.

Q3: Can I use this for financial calculations?
A: Yes, this calculator is commonly used for stock price changes, revenue growth, profit margins, and other financial metrics.

Q4: What if my old value is zero?
A: The calculation cannot be performed when the old value is zero since division by zero is mathematically undefined.

Q5: How accurate is the percentage change calculation?
A: The calculation is mathematically precise. The accuracy depends on the accuracy of your input values and the context of your measurement.