Read the forums there's loads of tips on putting and how to adjust speed etc.
Personally i for example on you putt of 46ft with 11" up on a tourney green, add them together giving you 57, then minus 30% = 39.9"
20% less for VF grns, 10% for fast, 0% for standard and add 10% for slow.
Thats how some people cope, there are others that divide the figures, look on the forum, you'll find all you need.