Percentage change is a mathematical concept that measures the relative change between two values over time or between different scenarios. It expresses the difference as a percentage of the initial value, allowing for easy comparison of changes across different scales or contexts.

To calculate percentage change:

- Determine the initial value and the final value
- Calculate the difference between the final and initial values
- Divide the difference by the initial value
- Multiply the result by 100 to convert to a percentage

The formula for percentage change is:

\[ \text{Percentage Change} = \frac{\text{Final Value} - \text{Initial Value}}{\text{Initial Value}} \times 100\% \]

- Identify the initial value and final value
- Subtract the initial value from the final value
- Divide the result by the initial value
- Multiply by 100 to convert to a percentage
- Interpret the result: positive for an increase, negative for a decrease

Let's calculate the percentage change from an initial value of 50 to a final value of 75

- Initial value: 50, Final value: 75
- Difference: 75 - 50 = 25
- Divide by initial value: 25 / 50 = 0.5
- Convert to percentage: 0.5 × 100% = 50%
- Result: The percentage change is a 50% increase

*Visual representation of 50% increase from 50 to 75*

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