# Excel Tutorial: How To Calculate Percentage Increase Or Decrease In Excel

## Introduction

Whether you're a student analyzing data for a class project or a business professional creating reports, understanding how to calculate percentage increase or decrease in Excel is a crucial skill. This essential tutorial will guide you through the step-by-step process of performing these calculations, allowing you to accurately analyze and interpret data in your spreadsheets.

## Key Takeaways

• Understanding how to calculate percentage increase or decrease in Excel is important for students and business professionals alike
• The basic formulas for percentage increase and decrease are crucial to grasp for accurate data analysis
• Using Excel functions can simplify the process of calculating percentage increase or decrease
• Formatting the results in Excel is essential for better visualization and interpretation of the data
• Avoiding common mistakes when working with percentage calculations in Excel is crucial for accurate results

## Understanding the basic formula for percentage increase or decrease

When working with data in Excel, it is often necessary to calculate the percentage increase or decrease between two values. Understanding the basic formula for these calculations is essential for accurate analysis.

A. Define the basic formula for calculating percentage increase

The basic formula for calculating percentage increase is:

(New Value - Old Value) / Old Value * 100

B. Define the basic formula for calculating percentage decrease

The basic formula for calculating percentage decrease is:

(Old Value - New Value) / Old Value * 100

C. Provide examples to illustrate each formula

Example for percentage increase:

• If the old value is 50 and the new value is 75, the percentage increase would be:
• (75 - 50) / 50 * 100 = 50%

Example for percentage decrease:

• If the old value is 100 and the new value is 80, the percentage decrease would be:
• (100 - 80) / 100 * 100 = 20%

## Applying the formula in Excel

When working with data in Excel, it is essential to know how to calculate percentage increase or decrease. Here's how you can do it:

A. Demonstrate how to input the necessary data into Excel for calculating percentage increase
• Step 1: Open a new Excel spreadsheet and input the original value in cell A1.
• Step 2: Input the new value in cell A2.
• Step 3: In cell A3, input the formula =((A2-A1)/A1)*100 to calculate the percentage increase.
• Step 4: Press Enter to see the calculated percentage increase.

B. Demonstrate how to input the necessary data into Excel for calculating percentage decrease
• Step 1: Open a new Excel spreadsheet and input the original value in cell A1.
• Step 2: Input the new value in cell A2.
• Step 3: In cell A3, input the formula =((A1-A2)/A1)*100 to calculate the percentage decrease.
• Step 4: Press Enter to see the calculated percentage decrease.

C. Explain the use of cell references in the formulas
• Using cell references: When inputting the formula to calculate the percentage increase or decrease, it is essential to use cell references rather than hard-coding the values into the formula. This allows for flexibility and the ability to update the original and new values without modifying the formula.
• Benefits of using cell references: By using cell references, you can easily update the values in the respective cells and have the percentage increase or decrease automatically calculated based on the updated values. This saves time and reduces the risk of errors in the calculations.

## Formatting the results

When working with data in Excel, it’s important to not only calculate the percentage increase or decrease accurately but also to present the results in a clear and visually appealing manner. This not only enhances the readability of your data but also makes it easier for others to interpret the information.

### A. Discuss the importance of formatting the results for better visualization

Formatting the results is crucial for better visualization as it helps in drawing attention to the key findings of the analysis. It allows the reader to quickly grasp the significance of the percentage increase or decrease without having to dive deep into the numbers.

### B. Show how to format the cell containing the percentage increase or decrease

• Highlight the cell: To draw attention to the percentage increase or decrease, you can apply formatting such as bold, italics, or underline to the cell containing the result. This can be done by selecting the cell and using the formatting options in the toolbar.
• Apply color: Using color can also help in visually indicating the direction of the change. For example, using green for a percentage increase and red for a percentage decrease can make the results stand out.
• Add percentage symbol: It’s a good practice to include the percentage symbol (%) next to the result to clearly indicate that it is a percentage change.

## Using functions for percentage increase or decrease

When working with data in Excel, it is often necessary to calculate the percentage increase or decrease between two values. Fortunately, Excel provides built-in functions that make this task easy and efficient.

A. Introduce the use of Excel functions for calculating percentage increase

### 1. Using the formula: =(new value - old value) / old value

One of the simplest ways to calculate percentage increase in Excel is by using the formula: =(new value - old value) / old value. This formula subtracts the old value from the new value, divides it by the old value, and then multiplies by 100 to get the percentage increase.

B. Introduce the use of Excel functions for calculating percentage decrease

### 1. Using the formula: =(old value - new value) / old value

Similarly, to calculate percentage decrease in Excel, you can use the formula: =(old value - new value) / old value. This formula subtracts the new value from the old value, divides it by the old value, and then multiplies by 100 to get the percentage decrease.

C. Provide step-by-step instructions for using these functions

### 1. Using the formula in a cell

To calculate percentage increase or decrease, simply enter the formula in a cell, replacing "new value" and "old value" with the appropriate cell references or values. For example, to calculate the percentage increase from A1 to A2, you would enter: =(A2 - A1) / A1.

### 2. Using the built-in percentage function

Alternatively, Excel also provides a built-in percentage function that can be used to calculate percentage increase or decrease. Simply enter =PERCENTAGE(new value, old value) to get the percentage increase or decrease.

## Common mistakes to avoid

A. Identify common errors made when calculating percentage increase or decrease

• Using incorrect values: One of the most common mistakes is using the wrong starting and ending values when calculating percentage increase or decrease. This can lead to inaccurate results.
• Forgetting to use absolute cell references: When referencing cells in Excel formulas, it's crucial to use absolute cell references to ensure the accuracy of the calculations.
• Not accounting for negative values: Failing to consider negative values can result in incorrect percentage calculations, especially when dealing with financial data.

B. Provide tips on how to avoid these mistakes when working with Excel

• Double-check your input: Review the input data carefully to ensure you are using the correct values for the calculation.
• Use absolute cell references: When creating formulas in Excel, always use absolute cell references (e.g., \$A\$1) to prevent the formula from changing when copied to other cells.
• Consider using the ABS function: If working with data that includes negative values, consider using the ABS function to ensure accurate percentage calculations.

C. Emphasize the importance of double-checking the input data and formulas

It cannot be overstated how crucial it is to double-check the input data and formulas when calculating percentage increase or decrease. A simple mistake can lead to significant errors in the results, which can have serious implications, especially in financial or analytical scenarios.

## Conclusion

In conclusion, this tutorial has covered the important steps to calculate percentage increase or decrease in Excel. We have learned how to use simple formulas and functions to perform this task, making data analysis more efficient and accurate.

• Key Points: The tutorial explained the use of the formula for percentage increase and decrease, as well as the use of the percentage change function in Excel.
• Significance: Understanding how to calculate percentage change in Excel is crucial for accurate financial analysis, sales reports, and any data that involves changes over time. It allows for better decision-making and strategic planning.

By mastering these skills, you can become more proficient in handling and analyzing data in Excel, ultimately enhancing your professional expertise.

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