Luring in more and more Office users, Google has updated its cloud office suite to add support for 15 more file types. Just like with the other file types, you can edit the files listed below as you please after Google converts them. However, some things do get lost in the conversion. Macros, for example, are removed from macro file formats but you do get to keep the original file on Google Drive so you can reference those.
Here are the list of the newly supported formats:
dot, dotx, dotm, docm conversions to Google Docs
xlt, xltx, xltm, xlsm conversions to Google Sheets
pot, potx, potm, pptm, pps, ppsx, ppsm conversions to Google Slides
Source: Google | Via: Android Police