1. What is Percentage Change?

Percentage change measures the degree of change over time, expressed as a percentage. It's used to compare the difference between an old and new value relative to the old 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: A positive result indicates an increase, while a negative result indicates a decrease. The percentage shows how much the value has changed relative to the original.

3. Importance of Percentage Change

Details: Percentage change is widely used in finance, economics, science, and business to track growth rates, price changes, performance improvements, and other comparative metrics.

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 point change?
A: Percentage change is relative to the original value, while percentage points measure absolute difference between two percentages.

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: Why can't the old value be zero?
A: Division by zero is mathematically undefined, making percentage change calculation impossible when the original value is zero.

Q4: What if both values are the same?
A: If new and old values are identical, the percentage change will be 0% (no change).

Q5: 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.