Convert XLSX to XLS

[Kat3n]

Our facility is receiving files with an xlsx extension but we use Excel 2003.
How can we safely convert these files to open them in Excel 2003? Thanks.

 

[Bob I]

You would need Office 2007. Why not just install the Microsoft Office
Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats?

http://www.microsoft.com/downloads/...70-3ae9-4aee-8f43-c6bb74cd1466&displaylang=en