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 75.06 Joe 94.3 -9.9
-0.7
Harry 95.78 Justin 88.5 +2.2
Garrett 139.86 Kellen 93.32 +1.1
+0.0
Josh 122.7 Bill 125.26 -0.7
Amber 107.56 Jason 65.34 +0.7
Mark 110.82 AJ 113.9 +0.1
-0.1
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Tom 146.36 Kellen 70.62 +5.5
+0.9
Harry 109.88 Mark 110.78 -2.0
+0.1
Justin 78.38 Jason 72.66 -1.3
+0.2
Amber 96.88 Josh 128.76 -0.7
+0.1
Bill 109.4 Joe 93.36 -0.1
Garrett 96.98 AJ 93.82 +0.1
Week of 12/3100.0*Chance in playoffs100.0*Average seed
Harry 125.26 Tom 96.36 -0.8
Josh 113.54 Kellen 138.98 -0.2
Mark 110.42 Amber 70.5 +0.1
Joe 86.58 Jason 95.2 -0.1
Games Above .500
Chance Will Make Playoffs