How are these numbers calculated?

Big Games

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

Week of 4/8100.0*Chance in playoffs100.0*Average seed
Pumas UNAM 3 Penarol 1 +53.5
+1.0
Bolivar 1 Gremio 0 -11.6
-0.3
Week of 4/15None
Week of 4/25None
Points
Chance Will Make Playoffs