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
Tom 56 Tom O 69 +0.4
Nathan 92 Stephen 107 +0.2
Matt 73 Keith 57 -0.3
Dan 60 Justin 60 -0.1
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Tom O 123 Chelsea 74 +0.2
+0.5
Stephen 124 Tom 89 Out
Justin 47 Matt 10 +0.1
Nathan 73 Dan 80 +0.0
Week of 12/3100.0*Chance in playoffs100.0*Average seed
Keith 76 Tom O 75 -0.2
Stephen 81 Chelsea 76 +0.2
Games Above .500
Chance Will Make Playoffs