1. What is a Percentage Change Calculator?

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

Purpose: It helps analyze growth rates, price changes, performance improvements, and other comparative measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• New Value — The current or updated measurement
• Old Value — The original or previous measurement

Explanation: The difference between values is divided by the original value to determine relative change, then converted to a percentage.

3. Importance of Percentage Change Calculation

Details: Percentage change provides a standardized way to compare changes across different scales and units of measurement.

4. Using the Calculator

Tips: Enter both old and new values. The calculator automatically handles positive and negative changes.

5. Frequently Asked Questions (FAQ)

Q1: What does a negative percentage change mean?
A: A negative result 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 dividing by zero. The calculator won't compute in this case.

Q3: How is this different from percentage difference?
A: Percentage change compares two values over time, while percentage difference compares two simultaneous values.

Q4: Can I use this for percentage increase or decrease?
A: Yes - positive results indicate increase, negative results indicate decrease.

Q5: What fields commonly use percentage change?
A: Finance, economics, science, business analytics, and performance tracking all frequently use percentage change.