1. What is Percentage Change?

Percentage change measures the relative difference between an old value and a new value, expressed as a percentage. It shows how much a quantity has increased or decreased compared to its original 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 the change relative to the original value.

3. Importance of Percentage Change

Details: Percentage change is widely used in finance, economics, science, and everyday life to compare changes over time, analyze trends, and make informed decisions.

4. Using the Calculator

Tips: Enter both old and new values. The old value cannot be zero (division by zero is undefined). The calculator automatically determines if the change is an increase or decrease.

5. Frequently Asked Questions (FAQ)

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

Q2: How do I interpret a percentage change?
A: The percentage shows how much the value has changed relative to the original. For example, a 50% increase means the new value is 1.5 times the original.

Q3: What if my old value is zero?
A: Percentage change cannot be calculated when the old value is zero because division by zero is undefined.

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

Q5: Can percentage change be more than 100%?
A: Yes, when the new value is more than double the old value, the percentage change exceeds 100%.