How to Find the Percentage of Difference Between Values in Excel

You can use Excel to calculate the percentage of change between two values quickly. In our simple example, we show you what you need to know to be able to calculate things like how much the price of gas changed overnight or the percentage of a stock price’s rise or fall.

How Percentage of Change Works

The percentage of change between an original and a new value is defined as the difference between the original value and the new value, divided by the original value.

(new_value - original_value)/(original_value)

For example, if the price of a gallon of gasoline was $2.999 yesterday on your drive home and it rose to $3.199 this morning when you filled your tank, you could calculate the percentage of change by plugging those values into the formula.

($3.199 - $2.999)/($2.999) =  0.067 = 6.7%

Let’s Look at an Example

For our simple example, we will look at a list of hypothetical prices and determine the percentage of change between an original price and a new price.

Here is our sample data containing three columns: “Original Price,” “New Price,” and “Percentage of Change.”  We have formatted the first two columns as dollar amounts.

Start by selecting the first cell in the “Percentage of Change” column.

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