This post contains information about how to save a Microsoft Excel workbook or worksheet in 97-2003 Excel format.
How to save in 97-2003 format in Excel?
Go to the File tab in the worksheet you are working on and click on Save As.
Select Excel 97-2003 Workbook in Save as type and click on save.
Another way to save it is by using the shortcut key Ctrl+S and then choosing Excel 97-2003 Workbook in Save as type.