How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 11/28100.0*Chance in playoffs100.0*Average seed
Roma 0 Real Madrid 2 -3.2
-0.5
CSKA Moskva 1 Viktoria Plzeň 2 In
Week of 12/12None
Points
Chance Will Make Playoffs