Excel percentage formulas can get you through problems large and small every day—from determining sales tax (and tips) to calculating increases and decreases. We’ll walk through several ...

Step 4: Another formula you can use to calculate percentage is simply applying the / key in between two cells. For example, to pass a driving theory test, I need to get 80% of the questions correct.

The formula tells Excel to compute percentage markup and place it in the Percent Markup column. Copy the formula by clicking the black square in the lower right corner of cell C2 dragging down.

The formula should divide the profit by the amount of the sale, or = (C2/A2)100 to produce a percentage. In the example, the formula would calculate (17/25)100 to produce 68 percent profit margin ...