How are these numbers calculated?

Big Games

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

Week of 4/10None
Week of 4/18100.0*Chance in playoffs100.0*Average seed
Gimnasia y Esgrima 3 Defensor Sporting 0 -28.9
-0.3
Week of 4/24None
Points
Chance Will Make Playoffs