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
Wanderers 0 Boca Juniors 3 -26.4
-0.3
Palestino 4 Zamora 0 -18.0
-0.2
Week of 4/14None
Week of 4/21None
Points
Chance Will Make Playoffs