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 +37.8
+0.8
Libertad 1 Barcelona 1 +11.7
+0.2
Week of 4/14None
Week of 4/21100.0*Chance in playoffs100.0*Average seed
Atletico Nacional 4 Libertad 0 In
+0.8
Barcelona 0 Estudiantes 2 -6.9
-0.2
Points
Chance Will Make Playoffs