1. What is Percentage Difference?

Percentage difference measures the relative change between two values, expressed as a percentage of the original value. It's commonly used to compare changes in quantities over time or between different measurements.

2. How Does the Calculator Work?

The calculator uses the percentage difference formula:

Where:

• New Value — The current or changed value
• Old Value — The original or reference value

Explanation: The formula calculates how much a value has changed relative to its original amount, expressed as a percentage.

3. When to Use Percentage Difference

Details: Percentage difference is useful for comparing changes in prices, quantities, measurements, or any numerical values where you want to understand the relative change rather than absolute change.

4. Using the Calculator

Tips: Enter both old and new values. The old value cannot be zero (division by zero is undefined). Positive results indicate increase, negative results indicate decrease.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage difference and percentage change?
A: They're essentially the same calculation - both measure relative change between two values.

Q2: How do I interpret negative percentage?
A: A negative percentage indicates a decrease from the old value to the new value.

Q3: What if my old value is zero?
A: The calculation is undefined when old value is zero, as you cannot divide by zero.

Q4: Can I use this for percentage increase or decrease?
A: Yes, the same formula works for both increases (positive result) and decreases (negative result).

Q5: How is this different from percentage points?
A: Percentage points measure absolute difference between two percentages, while percentage difference measures relative change between any two values.