How are these numbers calculated?

Big Games

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

Week of 5/15100.0*Chance in playoffs100.0*Average seed
Boca Juniors 5 Alianza Lima 0 +29.3
+0.3
Palmeiras 3 Junior Barranquilla 1 +29.3
+0.3
Week of 5/22None
Points
Chance Will Make Playoffs