How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Chance in playoffs100.0*Average seed
Cerro Porteno 1 Santo Andre 0 In
+0.4
Week of 5/3100.0*Chance in playoffs100.0*Average seed
Deportivo Tachira 1 Palmeiras 2 -0.2
Week of 5/10100.0*Chance in playoffs100.0*Average seed
Palmeiras 0 Cerro Porteno 0 +0.3
Points
Chance Will Make Playoffs