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
K. Jackson 5 Scheck 8 +2.5
+0.1
Witcraft 10 Schoolman 6 -1.3
+0.1
Week of 11/20None
Games Above .500
Chance Will Make Playoffs