How are these numbers calculated?

Big Games

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

Week of 10/20100.0*Chance in playoffs100.0*Average seed
Colo-Colo 0 Jorge Wilstermann 1 In
+0.9
Penarol 3 Athletico-PR 2 -14.8
-0.1
Points
Chance Will Make Playoffs