Most projections round off.
20.4 HR = 20 HR
20.6 HR = 21 HR
I took my 26th ranked hitter ($24) and took away 1 HR, 1 hit, 1 SB, 1 run and 1 RBI. He dropped to 33rd among batters ($23).
In an auction, $1 is nothing, but 7 spots in a draft is a lot and could influence the pick.