Microsoft Excel's Data Validation tool lets you add a drop-down list to a cell based on existing data in a column. However, how this works depends on whether the source data is part of a formatted ...

It's easy to divide in Excel to make calculations and analyze data in a spreadsheet. Here's what you need to know to do it.

To add a formula in Google Sheets, click the cell where you want the answer, then choose one of the hundreds of functions.