How are these numbers calculated?

Big Games

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

Week of 4/8None
Week of 4/15100.0*Chance in playoffs100.0*Average seed
River Plate 5 Universidad San Martin 0 In
+0.8
Universidad Catolica 2 America 0 -0.1
+0.1
Week of 4/22None
Points
Chance Will Make Playoffs