How are these numbers calculated?

Big Games

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

Week of 4/7100.0*Chance in playoffs100.0*Average seed
Estudiantes 0 Atletico Nacional 1 -28.4
-0.7
Libertad 1 Barcelona 1 +4.6
+0.0
Week of 4/14None
Week of 4/21100.0*Chance in playoffs100.0*Average seed
Barcelona 0 Estudiantes 2 In
+0.9
Atletico Nacional 4 Libertad 0 +5.7
-0.0
Points
Chance Will Make Playoffs