How are these numbers calculated?

Big Games

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

Week of 4/7100.0*Chance in playoffs100.0*Average seed
Guarani 2 Racing 0 +21.5
+0.4
Deportivo Tachira 0 Sporting Cristal 0 -0.4
-0.0
Week of 4/14100.0*Chance in playoffs100.0*Average seed
Sporting Cristal 1 Guarani 1 In
+0.2
Racing 3 Deportivo Tachira 2 -0.1
Week of 4/21None
Points
Chance Will Make Playoffs