How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance in playoffs100.0*Average seed
Newell's Old Boys 3 Deportivo Lara 1 +19.8
+0.4
Universidad de Chile 0 Olimpia 1 +4.8
+0.0
Week of 4/9100.0*Chance in playoffs100.0*Average seed
Olimpia 4 Newell's Old Boys 1 -11.0
-0.5
Deportivo Lara 2 Universidad de Chile 3 -10.7
-0.1
Week of 4/16None
Points
Chance Will Make Playoffs