you develop for people. not percentages. the numbers means everything.
If 100% of mac users are on the latest version but that accounts for 1million users, and windows is split between 7 and 8. and heck, even XP... but the lowest is already 5 billion, then it is a no brainer that supporting one or two versions of windows makes more sense.
If 100% of mac users are on the latest version but that accounts for 1million users, and windows is split between 7 and 8. and heck, even XP... but the lowest is already 5 billion, then it is a no brainer that supporting one or two versions of windows makes more sense.