Mastering the Art of Calculating Percentages in Excel

Whether you are a student or a working professional, having a strong command of the Microsoft Excel spreadsheet programme is increasingly valuable in a variety of contexts. Mastering the art of calculating percentages in Excel stands out as an essential ability that you should focus on developing as you work towards achieving an Excel Certification. In this blog, we will investigate the calculations involving percentages by using the Percentage Formula in Excel.   

Table of contents   

  • Understanding the Power of Percentages  
  • What is the Percentage Formula in Excel?  
  • How to Calculate Percentage Increase or Decrease?  
  • Applying Excel Functions to Calculate Percentages   
  • Tips and Common Mistakes   
  • Conclusion  

Understanding the Power of Percentages   

Percentages are frequently used in data analysis. We use them to evaluate and compare values, identify trends, and make informed decisions. The percentage formula in Excel allows us to perform all this. A percentage is a ratio out of 100 given as a proportion or fraction. Excel simplifies working with percentages, allowing you to easily complete complex calculations.  

What is the Percentage Formula in Excel?   

Let’s lay a solid foundation by understanding the basic percentage calculation in Excel before we explore the complex strategies. To calculate a percentage of a given value, use the following formula:   

= (Percentage / 100) * Value   

For example, if you were analyzing sales data and needed to figure out 15% of the total revenue, the formula would be:   

= (15 / 100) * Total Revenue   

This simple formula forms the basis for a wide range of percentage calculations in Excel. 

How to Calculate Percentage Increase or Decrease?   

Excel provides a way to analyze trends by calculating percentage changes between two values. The percentage increase or reduction formula is beneficial while assessing sales growth or project expenses.   

The formula is: 

= ((New Value – Old Value) / Old Value) * 100   

For example, you monitor website traffic over two months, with 800 visitors in the first month and 1200 in the second, then applying the formula “= ((1200 – 800) / 800) * 100” shows a 50% increase in traffic.  

Applying Excel Functions to Calculate Percentages   

Excel’s functionality goes beyond basic formulas. It offers dedicated functions designed specifically for percentage calculations like:  

  1. PERCENTAGE Function: =PERCENTAGE(Percentage, Value)  
  2. This function simplifies percentage calculations, especially when dealing with quick calculations.  
  3. PERCENTILE.INC Function: =PERCENTILE.INC(array, k)  
  4. Statistical analysis often requires calculating percentiles; this function does the job effortlessly. Replace “array” with your data range and “k” with the desired percentile (e.g., k=75 for 75%).  
  5. SUMPRODUCT Function: =SUMPRODUCT(array1, array2)  
  6. This function calculates the sum of products of corresponding array elements. This is often used when percentages are part of complex calculations.  

Tips and Common Mistakes   

Excel makes percentage calculations simpler, but mistakes can still happen. For accurate results, make sure to:   

  1. Incorrect cell references can lead to wrong calculations. Always verify all of your formula references.   
  2. To avoid this error, ensure the denominator of your calculations is never zero.   
  3. Wrongly formatted cells will give the wrong results. Format all the cells properly to ensure accurate representation.   


Companies and businesses across all industries value certified Excel experts for their capacity to effectively handle data, streamline procedures, and make quick judgment calls. The thing that may tip the scales in your favour and increase your worth in the eyes of prospective employers is having an Excel Certification. Understanding and mastering percentage calculation in Excel is an important tool in your path to Excel Certification. The percentage formula in Excel is essential for easily performing various calculations. You will improve your Excel skills by understanding percentages, utilizing functions, and avoiding common mistakes. For more information, check this page out: The Knowledge Academy.

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