Excel will calculate the number of days between the dates entered in cells B3 and A3 and display the result in cell C3. Take your mouse pointer to the lower-right corner of cell C3. It will turn ...

Click an empty cell. Type "=PRODUCT(50%)." Replace "50%" with the percentage by which you want to multiply your column. Press "Enter" to finish entering the percentage in the cell.

Open Microsoft Excel. Enter a list of values in column A. As an example, you might enter item costs as "$10.95," "$9.99" and "$29.99" in cells A1 through A3.

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.