How are these numbers calculated?

Big Games

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

Week of 4/10100.0*Chance in playoffs100.0*Average seed
Audax Italiano 2 Necaxa 1 -6.3
Week of 4/18100.0*Chance in playoffs100.0*Average seed
Alianza Lima 0 Sao Paulo 1 +27.5
+0.5
Week of 4/24100.0*Chance in playoffs100.0*Average seed
Necaxa 2 Alianza Lima 0 -20.4
-0.4
Sao Paulo 2 Audax Italiano 2 In
+0.3
Points
Chance Will Make Playoffs