Adding a new column to either an entire spreadsheet or just a portion is an easy thing to do in Microsoft Excel. Here's how.

Learn how to multiply numbers in single cell, multiply multiple numbers from several cells, multiply column of numbers in Excel.

SUM is the spreadsheet equivalent of an open invite: it welcomes everything into the total, whether it belongs there or not.

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.