1. What is a Percent Change Calculator?

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

Purpose: It helps analyze growth, decline, or change in any measurable quantity over time or between different states.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• New — The current or recent value
• Old — The original or previous value

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

3. Importance of Percent Change Calculation

Details: Percent change is crucial in finance, economics, science, and business to track performance, growth rates, and trends.

4. Using the Calculator

Tips: Enter both old and new values. The calculator handles positive and negative values, but old value cannot be zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a positive/negative result mean?
A: Positive means increase, negative means decrease from old to new value.

Q2: What if my old value is zero?
A: Calculation is undefined (division by zero). Consider using absolute difference instead.

Q3: How is this different from percentage points?
A: Percent change is relative to original value, while percentage points are absolute differences between percentages.

Q4: Can I use this for percentage increase and decrease?
A: Yes, the same formula works for both cases.

Q5: What's a good percent change?
A: This depends entirely on context - what you're measuring and your goals.