Understanding Excel Column Headers Excel refers to rows by number and columns by letter, starting the first row at one and the first column with "A".

If you have a lengthy column of numbers that you need to multiply by a percentage, Excel includes tools to instantly apply the product to the entire range of cells in the column.

You can add a column in Excel by right-clicking or using the “Insert” option. These features are helpful for adding new data to a spreadsheet.

You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.