How are these numbers calculated?

Big Games

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

Week of 4/8100.0*Chance in playoffs100.0*Average seed
Oriente Petrolero 2 Universitario 2 +5.2
+0.1
Racing 4 Nacional 1 In
+0.5
Week of 4/15100.0*Chance in playoffs100.0*Average seed
Oriente Petrolero 0 Racing 1 +0.1
Universitario 2 Nacional 2 +0.1
Week of 4/25None
Points
Chance Will Make Playoffs