How are these numbers calculated?

Big Games

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

Week of 4/14None
Week of 4/21None
Week of 4/28100.0*Chance in playoffs100.0*Average seed
San Lorenzo 2 Universitario 0 +23.4
-0.1
Libertad 0 San Luis 2 +23.4
+0.5
Points
Chance Will Make Playoffs