How are these numbers calculated?

Big Games

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

Week of 4/5100.0*Chance in playoffs100.0*Average seed
Independiente del Valle 3 Atletico-MG 2 +12.2
+0.4
Melgar 1 Colo-Colo 2 -9.1
-0.1
Week of 4/12100.0*Chance in playoffs100.0*Average seed
Colo-Colo 0 Independiente del Valle 0 In
+0.0
Atletico-MG 4 Melgar 0 -0.5
-0.1
Week of 4/19None
Points
Chance Will Make Playoffs