1. What is Percentage Change?

Percentage change measures the degree of change over time in sales figures. It shows how much sales have increased or decreased compared to the original amount, expressed as a percentage.

2. How Does the Calculator Work?

The calculator uses the percentage change formula:

Where:

• New Sales — Current or most recent sales amount
• Old Sales — Previous or original sales amount

Explanation: A positive result indicates sales growth, while a negative result shows sales decline. The percentage format makes comparisons easier across different scales.

3. Importance of Percentage Change

Details: Tracking sales percentage changes helps businesses evaluate performance, identify trends, and make informed decisions about marketing strategies, inventory management, and resource allocation.

4. Using the Calculator

Tips: Enter both sales figures in the same currency. Old sales must be greater than zero. The calculator automatically handles both increases (positive results) and decreases (negative results).

5. Frequently Asked Questions (FAQ)

Q1: What does a negative percentage mean?
A: A negative percentage indicates a decrease in sales compared to the previous period.

Q2: How do I interpret a 0% change?
A: A 0% change means sales remained exactly the same between the two periods.

Q3: Why can't old sales be zero?
A: Division by zero is mathematically undefined. You cannot calculate percentage change from zero.

Q4: What time periods should I compare?
A: Common comparisons are month-over-month, quarter-over-quarter, or year-over-year, depending on your analysis needs.

Q5: How is this different from percentage difference?
A: Percentage change compares new value to original value, while percentage difference compares two values without directionality.