How are these numbers calculated?

Big Games

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

Week of 11/10100.0*Chance in playoffs100.0*Average seed
Kelso 164 Drennon 198 -0.1
Crouch 149 Best 108 -0.0
Week of 11/17None
Week of 11/24None
Games Above .500
Chance Will Make Playoffs