1. What is Percentage Change?

Percentage change measures the degree of change over time and is used in many financial, statistical, and scientific applications. It shows how much a value has increased or decreased relative to its original value.

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: The formula calculates the relative difference between two values as a percentage of the original value.

3. Importance of Percentage Change

Details: Percentage change is widely used in finance to track stock performance, in business to measure growth, in science to quantify experimental results, and in everyday life to understand price changes.

4. Using the Calculator

Tips: Enter both old and new values. The calculator will show the percentage increase or decrease. Values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage change and percentage points?
A: Percentage change measures relative change from an original value, while percentage points measure absolute differences between percentages.

Q2: How to interpret negative percentage change?
A: A negative percentage change indicates a decrease from the original value.

Q3: Can percentage change be more than 100%?
A: Yes, when the new value is more than double the original value, the percentage change exceeds 100%.

Q4: What if my old value is zero?
A: Percentage change is undefined when the original value is zero, as division by zero is impossible.

Q5: How is percentage change different from absolute change?
A: Absolute change shows the simple difference (new - old), while percentage change shows the relative difference compared to the original value.