So I'm looking at a pre-generated campaign with an ogre, and it says in the noting box that if the players are of a higher level than the adventure intended, give the ogre a level of warrior 1. NPC classes count as 1/2 a lvl adjustment, doesn't it? Do you round that up? Like say an ogre warrior is CR 4 as opposed to CR 3.5? Or is it CR 3, but just a little bit tougher?
The ravenous template adds +1 CR to a creature. This is perfect for a zombie. However, a zombie commoner is CR 1/2. Adding the template makes it CR 1.5. Is it now CR 2?
There's one for the death knight as well. It only adds 1/2 a CR.
What do you do when the templates or classes only add CR 1/2?