Thanks, those links are helpful, although the first one w/re/to the supply % discussion is pretty confusing to this non-math person. I do see now that the SP% number is same as the little supply dot number. Higher number the better.
w/re/to the AT% and AP%, those are a bit clearer to me, but now a "real world" application of that information. In the below, we see the German 30th Infantry Division contemplating an assault on Novgorod, but it seems to me that the NKVD HQ unit entrenched there has some pretty hefty bonus percentages (AT 350%, AP 400%) so with just those infantry units it seems like a bad gamble, even when the planner says 6+ to 1 odds. Seems like we need to get the heavy artillery guns up there and pound this commie nest Novgorod for a while, and add some assault engineers for the bridge / river in the hex. Maybe get the Totenkopf involved if they can get around the back side of the lake. Thanks again!