1. What is a Percent Change Calculator?

Definition: This calculator determines the percentage difference between a new value and an old value.

Purpose: It helps analyze growth, decline, or change between two values in various fields like finance, statistics, and business.

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 values is divided by the old value, then multiplied by 100 to get a percentage.

3. Importance of Percent Change Calculation

Details: Percent change is crucial for tracking performance metrics, financial growth, statistical analysis, and comparing data over time.

4. Using the Calculator

Tips: Enter both new and old values. The old value cannot be zero. Positive results indicate increase, negative results indicate decrease.

5. Frequently Asked Questions (FAQ)

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

Q2: Why can't the old value be zero?
A: Division by zero is mathematically undefined, making percent change calculation impossible.

Q3: How do I interpret a 100% change?
A: A 100% increase means the new value is double the old value. A 100% decrease means the new value is zero.

Q4: Is percent change the same as percentage points?
A: No, percent change measures relative change, while percentage points measure absolute difference between percentages.

Q5: Can I use this for financial calculations?
A: Yes, this is commonly used to calculate investment returns, price changes, and revenue growth.