XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.

When you enter a date that's formatted with slashes, Excel will recognize it as a date. For example, Excel will automatically choose the date format for a cell that contains 11/11/19. You can set ...

The cells in a Microsoft Excel spreadsheet can hold various types of numerical data, including fractions and percentages. If some or all of your cells contain fractions, Excel enables you to convert ...

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