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 widely 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:

• \( New \) — The new or current value
• \( Old \) — The original or previous value

Explanation: The formula calculates the relative change between two values by finding the difference, dividing by the original value, and converting to percentage by multiplying by 100.

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 including business, finance, and scientific research.

4. Using the Calculator

Tips: Enter both old and new values as numerical values. The old value cannot be zero as division by zero is undefined. Results are displayed with two decimal places for precision.

5. Frequently Asked Questions (FAQ)

Q1: What does a positive percentage change indicate?
A: A positive percentage change indicates an increase or growth from the old value to the new value.

Q2: What does a negative percentage change mean?
A: A negative percentage change indicates a decrease or decline from the old value to the new value.

Q3: Can percentage change be more than 100%?
A: Yes, percentage change can exceed 100% when the new value is more than double the old value, indicating substantial growth.

Q4: How is percentage change different from percentage point?
A: Percentage change measures relative change between values, while percentage points measure absolute difference between percentages.

Q5: What if the old value is zero?
A: Percentage change cannot be calculated when the old value is zero because division by zero is mathematically undefined.