How are these numbers calculated?

Big Games

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

Week of 5/16100.0*Chance in playoffs100.0*Average seed
Lanus 3 Chapecoense 0 +11.1
+0.1
Zulia 0 Nacional 0 +6.2
+0.2
Week of 5/24None
Points
Chance Will Make Playoffs