Percentage Change Calculator Year Over Year

Percentage Change Formula:

\[ \% Change = \frac{(Current\ Year - Previous\ Year)}{Previous\ Year} \times 100 \]

Percentage Change (%):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Year Over Year Percentage Change?

Year Over Year (YoY) percentage change is a financial metric that compares the value of a variable in the current year to its value in the previous year, expressed as a percentage. It is commonly used in business, economics, and finance to measure growth rates and performance trends.

2. How Does the Calculator Work?

The calculator uses the percentage change formula:

\[ \% Change = \frac{(Current\ Year - Previous\ Year)}{Previous\ Year} \times 100 \]

Where:

\( Current\ Year \) — Value for the current period
\( Previous\ Year \) — Value for the previous period
\( \% Change \) — Resulting percentage change

Explanation: The formula calculates the relative change between two consecutive years, showing growth or decline as a percentage of the previous year's value.

3. Importance of Percentage Change Calculation

Details: YoY percentage change is crucial for analyzing business performance, tracking economic indicators, evaluating investment returns, and making strategic decisions based on growth trends.

4. Using the Calculator

Tips: Enter the current year value and previous year value as unitless numbers. The calculator will compute the percentage change. Ensure previous year value is not zero to avoid division errors.

5. Frequently Asked Questions (FAQ)

Q1: What does a positive percentage change indicate?
A: A positive percentage change indicates growth or increase from the previous year to the current year.

Q2: What does a negative percentage change indicate?
A: A negative percentage change indicates decline or decrease from the previous year to the current year.

Q3: Can I use this for monthly or quarterly comparisons?
A: While designed for year-over-year comparisons, the formula works for any two consecutive periods with appropriate labeling.

Q4: What if the previous year value is zero?
A: The calculation is undefined when previous year value is zero, as division by zero is mathematically impossible.

Q5: How is this different from percentage point change?
A: Percentage change measures relative change from a base value, while percentage point change measures the absolute difference between two percentages.