1. What is Percentage Change?

Percentage change measures the degree of change over time, expressed as a percentage. It shows how much a value has increased or decreased relative to its original amount.

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. A positive result indicates an increase, while a negative result indicates a decrease.

3. Importance of Percentage Change

Details: Percentage change is widely used in finance, economics, statistics, and business to track growth rates, price changes, performance metrics, and more. It provides a standardized way to compare changes across different scales.

4. Using the Calculator

Tips: Enter both old and new values. The old value cannot be zero (division by zero is undefined). The calculator will show the percentage increase or decrease.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage change and percentage difference?
A: Percentage change compares a new value to an old value, while percentage difference compares any two values without directionality.

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

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

Q4: 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.

Q5: How is percentage change different from percentage points?
A: Percentage change measures relative change, while percentage points measure absolute difference between percentages.