How are these numbers calculated?

Big Games

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

Week of 10/20100.0*Chance in playoffs100.0*Average seed
Olimpia 0 Delfin 1 +51.8
+1.2
Santos 2 Defensa y Justicia 1 +7.8
+0.1
Points
Chance Will Make Playoffs