Calculating percentage is useful in many areas of life, for example, calculating the discount price or the percentage of total. In this tutorial, it provides some examples and formulas to tell you how to calculate percentages in Excel.

Example 1: Get the percentage of a given total

Example 2: Get the percentage of unknown total

Example 1: Increase a number by a percentage

Example 2: Decrease a number by a percentage

For example, you have some values in column B (B2:B4), and the total number of these values is in cell B5 as below screenshot shown:

Now you want to get the percentage of each value of the total, please do as below:

1. Select a blank cell, here is C2, type below formula, then press **Enter** key to get the first percentage:

`=B2/$B$5`

2. Then **double click** at the auto fill handle (the small green square in the right corner of the formula result cell) to fill the formula to below cells.

Select the result cells, then click **Home** tab, and go to **Number **group, select **Percentage** **Style**.

Now the results are shown in percentage formatting.

For example, there is a table that contains the scores of students. Now you want to get the percentage of score 1 of each total:

1. Select a blank cell, here is D8, type below formula, then press **Enter** key to get the first percentage:

`=B8/SUM(B8:C8)`

2. Then **double click** at the auto fill handle (the small green square in the right corner of the formula result cell) to fill the formula to below cells.

Select the result cells, then click **Home** tab, and go to **Number **group, select **Percentage** **Style**.

Now the results are shown in percentage formatting.

Let’s say the income of company A in year 2022 is $3,000,000, and the income of company A in year 2021 is $2,680,000, what is the percentage of change between these two years? You can calculate the difference by subtracting the new income (2022) to the original income (2021), then dividing the result by the original income (2021).

Select a blank cell, here is C9, type below formula, then press **Enter** key to get the percentage of change:

`=(B9-A9)/A9`

If you want to apply this formula to below cells, **double click** at the auto fill handle (the small green square in the right corner of the formula result cell) to fill.

Select the result cell, then click **Home** tab, and go to **Number **group, select **Percentage** **Style**.

Now the result is shown in percentage formatting.

**Note**: In the formula, if the divisor (the older value) is zero or blank, the formula will return #DIV/0! error value. For avoiding this, you can use formula:

`=IF(A9=0,1,(B9-A9)/A9)`

Then the result is returned 100%.

Suppose the sale price of a laptop is $120, which is 20% off the original price. The question is what is the original price of this laptop?

Select a blank cell, here is G9, type below formula, then press **Enter** key to get the total number:

`=E9/(1-F9)`

If the original price of a coat is $110, but you need to pay additional 12% in sales tax, how much you need to pay for the sales tax?

Select a blank cell, here is C13, type below formula, then press **Enter** key:

`=A13*B13`

Let’s say that your annual salary is $320000 last year, your company decides to increase your annual salary by 20% this year, how much you will earn in this year?

Select a blank cell, here is C17, type below formula, then press **Enter** key:

`=A17*(1+B17)`

Suppose the manager wants to decrease the advertising cost of $10,000 by 25% next month, what is the new monthly advertising cost?

Select a blank cell, here is C21, type below formula, then press **Enter** key:

`=A21*(1-B21)`

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- Video: Calculate percentage
- Get the percentage of total
- Get the percentage of a given total
- Get the percentage of unknown total
- Get the percentage of change
- Get the total by amount and percentage
- Get the amount by total and percentage
- Increase or decrease a number by a percentage
- Increase a number by a percentage
- Decrease a number by a percentage
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