# Percent (simple number) calculations

You can use simple number functions to perform useful percent calculations on your data. Simple number functions include addition, subtraction, multiplication, and division.

Function Description Examples

*

Returns the result of multiplying both numbers.

3 * 2 = 6 price * taxrate

+

Returns the result of adding both numbers.

1 + 2 = 3 price + shipping

-

Returns the result of subtracting the second number from the first.

3 - 2 = 1 revenue - tax

/

Returns the result of dividing the first number by the second.

6 / 3 = 2 markup / retail price

## Calculate percentages

Calculating percentages is useful when you want to see, for example, the percentage of revenue that each retail department generates (gifts, bakery, canned goods, etc.).

Create a formula called `Percent Revenue` in the Formula Assistant:

`( sum ( revenue ) / group_sum ( revenue ) ) * 100`

Replace `revenue` with your company’s name for their `revenue` column, such as `revenue_dollar_amount`.

Now you can see the percentage of your total revenue that each department contributes, using the percent revenue formula that you just created. See the example below. 