How are these numbers calculated?

Big Games

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

Week of 11/6100.0*Chance in playoffs100.0*Average seed
Zwiefel 9 M. Jackson 4 +0.1
+0.6
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Chick 7 Scheck 6 Out
-0.4
Witcraft 11 Kato 5 Out
-0.1
Zwiefel 7 Schoolman 11 Out
-1.0
Games Above .500
Chance Will Make Playoffs