How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Chance in playoffs100.0*Average seed
Kevin 63.4 Stephen 93 In
Piatt 91.3 Ryan 86.4 In
+0.4
John 72.8 Evan 122.4 -0.1
-0.1
Becky 97.2 Jess 108.8 +0.2
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Jess 53.7 Piatt 116.3 +0.3
Week of 12/3None
Games Above .500
Chance Will Make Playoffs