Question: how to calculate the markup percentage in excel?
Answer: Launch Excel and create a new spreadsheet. ... 
Type "Cost" in cell A1, "Selling Price" in cell B1 and "Percent Markup" in cell C1 (omit the quotation marks here and throughout). ... 
Type "10" in cell A2 and "12" in cell B2. ... 
Click cell C2 and type the following formula into that cell: