1. What is a Percentage Change Calculator?

Definition: This calculator determines the percentage increase or decrease between two values.

Purpose: It helps analyze growth, decline, or change in various contexts like finance, statistics, and performance metrics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• New — The current or new value
• Old — The original or old value

Explanation: The difference between new and old value is divided by the old value, then multiplied by 100 to get percentage.

3. Importance of Percentage Change Calculation

Details: Percentage change helps compare relative differences regardless of scale, making it useful for analyzing trends over time.

4. Using the Calculator

Tips: Enter both new and old values. The old value cannot be zero (division by zero is undefined).

5. Frequently Asked Questions (FAQ)

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

Q2: What if my old value is zero?
A: Percentage change is undefined when the old value is zero, as you cannot divide by zero.

Q3: How do I interpret a 100% increase?
A: A 100% increase means the new value is double the old value (200% of the original).

Q4: Can I use this for percentage difference between two values?
A: Yes, the formula works for both increases and decreases between any two values.

Q5: What's the difference between percentage change and percentage points?
A: Percentage change measures relative difference, while percentage points measure absolute difference between percentages.