How are these numbers calculated?

Big Games

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

Week of 4/10100.0*Chance in playoffs100.0*Average seed
Cucuta Deportivo 3 Gremio 1 +16.6
+0.5
Cerro Porteno 1 Deportes Tolima 0 +1.9
-0.2
Week of 4/18None
Week of 4/24100.0*Chance in playoffs100.0*Average seed
Deportes Tolima 3 Cucuta Deportivo 4 In
+1.2
Gremio 1 Cerro Porteno 0 -0.0
Points
Chance Will Make Playoffs