How to open Ms excel 2007 files in Ms excel 2003

After release of Microsoft office 2007 Microsoft changed extension for its MSword,power point & Excel saved as default extension with Microsoft office 2007 can't opened in 2003 here are some alternative solution for how to open.

Use Microsoft compatibility pack
After getting negative response from users Microsoft released compatibility pack that allow Microsoft office to be opened in Microsoft office 2003 and using this you can change,edit,save2007 files in 2003.This pack can also be used to open Ms-word 2007 files in Ms-2003 click here for compatibility pack Click here

Download excel viewer
If you don't have Ms-office then you can download and install from Microsoft official website then you can open,view click here to download viewer Click here

Download open office
If you want to edit xlxs files but you don't have MS-office then you can download and install open office .It is free and open source from sun micro system .It can also used in presentation ,word processing,spreadsheet,database etc click here to download