Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

The difference is your overall profit, in this example the formula result would be $17. Input a formula in the final column to calculate the profit margin on the sale.

How to Calculate Profit Margin With Only Sales and Net Loss. A company's profit margin reveals how much of its earnings it gets to keep after it pays all of its expenses.