How are these numbers calculated?

Big Games

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

Week of 11/5100.0*Chance in playoffs100.0*Average seed
Witcraft 8 Kato 6 -11.0
-0.7
M. Jackson 16 Scheck 2 -4.6
K. Jackson 4 Collins 8 -0.4
+0.1
Chick 11 Mitchell 2 -0.1
Week of 11/19100.0*Chance in playoffs100.0*Average seed
M. Jackson 7 Chick 4 -0.7
Witcraft 8 K. Jackson 6 -0.3
Collins 9 Kato 0 -0.1
Games Above .500
Chance Will Make Playoffs