1. What is a Change in Price Percentage Calculator?

Definition: This calculator determines the percentage change between an old price and a new price.

Purpose: It helps individuals and businesses analyze price changes, whether for financial analysis, sales tracking, or economic studies.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• New Price — The current or updated price
• Old Price — The original or previous price

Explanation: The difference between new and old price is divided by the old price to get the relative change, then multiplied by 100 to convert to percentage.

3. Interpreting the Results

Positive Value: Indicates a price increase (e.g., +15% means the price increased by 15%)

Negative Value: Indicates a price decrease (e.g., -10% means the price decreased by 10%)

4. Using the Calculator

Tips: Enter both old and new prices in dollars. The old price must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a 0% change mean?
A: It means there was no change between the old and new prices.

Q2: How do I calculate price reduction percentage?
A: The calculator shows negative percentages for price reductions automatically.

Q3: Why can't the old price be zero?
A: Division by zero is mathematically undefined, so we need a positive starting value.

Q4: Can I use this for non-monetary values?
A: Yes, it works for any numerical values where you want to measure percentage change.

Q5: How is this different from percentage difference?
A: Percentage change compares a new value to an old value, while percentage difference compares any two values symmetrically.