How are these numbers calculated?

Big Games

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

Week of 5/15100.0*Chance in playoffs100.0*Average seed
Monagas 1 Gremio 2 In
+0.1
Defensor Sporting 0 Cerro Porteno 1 +0.8
-0.2
Week of 5/22100.0*Chance in playoffs100.0*Average seed
Gremio 1 Defensor Sporting 0 +0.2
Cerro Porteno 3 Monagas 2 -0.1
Points
Chance Will Make Playoffs