How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance in playoffs100.0*Average seed
Emelec 2 Penarol 0 +42.4
+0.6
Deportes Iquique 1 Velez Sarsfield 3 +1.2
+0.0
Week of 4/9100.0*Chance in playoffs100.0*Average seed
Penarol 3 Deportes Iquique 0 -21.2
-0.2
Velez Sarsfield 0 Emelec 0 In
+0.1
Week of 4/16None
Points
Chance Will Make Playoffs