Percentage Change Calculator

- May 11, 2025
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Calculate percentage change between two values. This calculator helps you determine how much a value has changed in percentage terms.

Enter Values

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About Percentage Change

Percentage change measures the relative change between two values. It's commonly used in finance, statistics, business analysis, and everyday calculations.

Percentage Increase

When the new value is larger than the original value, the percentage change is positive, indicating an increase. For example, if a price goes from £80 to £100, that's a 25% increase.

Percentage Decrease

When the new value is smaller than the original value, the percentage change is negative, indicating a decrease. For example, if a price drops from £100 to £75, that's a 25% decrease.

Special Cases
  • Zero Original Value: If the original value is zero, the percentage change is technically undefined (division by zero). In such cases, the result is shown as "Infinity".
  • Same Values: If both values are the same, the percentage change is 0%.
  • Negative Values: The calculator works with negative input values, but be careful interpreting the results in a real-world context.

Understanding the Percentage Change Calculator

The Percentage Change Calculator is a handy tool that helps you see how much one number has changed compared to another. It’s particularly useful for those who need to track changes in values, such as in Finance or daily expenses. By simply entering two numbers, you can find out the percentage change, whether it’s an increase or decrease.

How to Enter Your Values

This calculator requires two main inputs: the original value and the new value. The original value is the starting point, while the new value represents what you want to compare it to. Make sure both numbers are entered correctly to get an accurate percentage change.

Why Percentage Change Matters

  • It helps in Financial analysis, like tracking Investment growth.
  • Useful for comparing prices in shopping or budgeting.
  • Important in Statistics for understanding data trends.

Options to Personalise Your Results

The calculator allows you to customise your results by choosing how many decimal places to display. You can also opt to see the calculation steps and formulas used. This feature is great for those who want to understand how the result was derived or need to present the calculation clearly.

Interpreting Your Results

After entering your values, the calculator will show you the percentage change along with the difference between the two values. If the new value is higher, it indicates a percentage increase. Conversely, if the new value is lower, it reflects a percentage decrease. Understanding this can help you make informed decisions based on the results.

Understanding Percentage Increase and Decrease

  • Percentage Increase: This occurs when the new value is greater than the original value. For example, if something costs £80 and then £100, that’s a 25% increase.
  • Percentage Decrease: This happens when the new value is less than the original value. For instance, if a price drops from £100 to £75, that’s a 25% decrease.

Special Considerations in Calculations

When using the calculator, there are some special cases to keep in mind. If your original value is zero, the percentage change is considered undefined. Additionally, if both values are the same, the percentage change will always be zero. Finally, the calculator can work with negative values, but interpreting the results might require extra thought.

Practical Examples of Percentage Change

To better understand percentage change, consider some common examples. If you have a product that increases from £100 to £150, that's a 50% increase. Alternatively, if a service drops from £100 to £50, that’s a 50% decrease. These examples illustrate how simple changes can translate into significant percentages.