How to Find a Percentage Difference in Google Sheets – How-To Geek

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When you want to know how much your sales went up or your bills went down, you can calculate a percentage difference in Google Sheets.
With a simple formula, you can see the percentage increase or decrease between your values. You can also format the result as a percentage or whole number, automatically or manually.
RELATED: How to Calculate Percentage in Google Sheets

Calculate a Percentage Increase or Decrease
    Automatically Format the Percentage
    Manually Format the Percentage
Alternative Formula for a Percentage Change

To calculate the difference between two values as a percentage, you’ll use a basic formula. The syntax is (new_value - original_value)/original_value or the new value minus the original value with the result divided by the original value.
RELATED: How to Find the Percentage of Difference Between Values in Excel
For an example, we want to find the percentage difference in our sales from January to February. We can see that some sales went up while others went down. You would use this formula:
The result is -0.25 or negative 25 percent. The formula accounts for decreases by placing a negative symbol in front of the result.
Percentage decrease in Google Sheets
For a positive result, we’ll use our next product and the same formula with updated cell references:
This time our result is 0.08 or 8 percent.
Percentage increase in Google Sheets
If you prefer to display your results as percentages rather than decimals, you can do this automatically with a slight change to the formula or manually using the tools in Google Sheets.
Google Sheets offers a handy function for converting numbers to percentages. The function is TO_PERCENT and the syntax is TO_PERCENT(value) where the argument can be a number or cell reference.
By adding the function to the beginning of the percentage formula which becomes the value, you’ll see your result automatically formatted for you.

Remember to place the entire original formula in parentheses when using the TO_PERCENT function.
RELATED: 9 Basic Google Sheets Functions You Should Know
If you’ve already entered the percentage formulas into your sheet and don’t want to change them, you can simply format the results as percentages.
Select the cell(s) containing the results and do one of the following:
Percent button the toolbar
There is another formula you can use that’s similar to the first. This one multiplies the result by 100, thus providing you with a formatted decimal number. You can use this if you don’t necessarily need to display the percent symbol.
RELATED: How to Change and Create Custom Number Format in Google Sheets
Using our same examples as above, you would use this formula:
Now rather than showing our result as -0.25, it displays as -25.00 or negative 25 percent.
Alternative formula for percentage decrease in Google Sheets
The same works for our second example giving us a positive result of 8.00 or 8 percent.
Alternative formula for percentage increase in Google Sheets
Calculating the percentage difference between your values can give you a quick and clear picture of how numbers change. For more, take a look at how to make negative numbers red in Google Sheets.
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