1. What Is Percentage Change?

Percentage change measures the degree of change over time and is used to compare the relative change between an old value and a new value. It expresses the change as a percentage of the original value.

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: A positive result indicates an increase, while a negative result indicates a decrease. The formula calculates the relative change as a percentage of the original value.

3. Importance Of Percentage Change Calculation

Details: Percentage change is widely used in finance, economics, business, statistics, and scientific research to measure growth rates, performance changes, market trends, and experimental results.

4. Using The Calculator

Tips: Enter the original value and the new value. The calculator will automatically compute the percentage change and indicate whether it's an increase or decrease. Ensure the old value is not zero.

5. Frequently Asked Questions (FAQ)

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

Q2: Can percentage change be more than 100%?
A: Yes, percentage change can exceed 100% when the new value is more than double the original value.

Q3: What if the old value is zero?
A: Percentage change is undefined when the old value is zero, as division by zero is mathematically impossible.

Q4: How is percentage change different from percentage difference?
A: Percentage change compares two values over time, while percentage difference compares two different values at the same time point.

Q5: Where is percentage change commonly used?
A: Common applications include stock market performance, sales growth, population changes, inflation rates, and scientific experiment results.