Incase you recieved a file that is created in office 2007 lets say a word document created in 2007 and you are using an older version of office like 2003 then you wont be able to open the file normally but yes there are things using which we can do that very easily
First options is at the time of file creation itself in office 2007,lets say in a excel sheet on the top left you need to click on the circle for more options
Once you have created a file at the time of saving click on save as option and then choose 97-2003 workbook option once you do that then everyone would be able to open the file in older versions of office as well
And incase you got a file created in word 2007 and you are using word 2003 you wont be able to open the file but you can by downloading and installing File Format Converters from Microsoft
Click Here To Download Microsoft File Format Converters
After installing this converter you can open files created in office 2007 or office 2010 versions even if you are using an older version
