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
Harry 95.78 Justin 88.5 +17.6
+1.1
Tom 75.06 Joe 94.3 -2.3
-0.1
Amber 107.56 Jason 65.34 +1.9
+0.1
Mark 110.82 AJ 113.9 -1.1
-0.1
Josh 122.7 Bill 125.26 +0.5
Garrett 139.86 Kellen 93.32 +0.2
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Harry 109.88 Mark 110.78 -22.2
-1.1
Amber 96.88 Josh 128.76 -9.1
-0.2
Garrett 96.98 AJ 93.82 +2.5
+0.2
Bill 109.4 Joe 93.36 +2.4
+0.1
Tom 146.36 Kellen 70.62 +2.1
-0.1
Justin 78.38 Jason 72.66 +0.3
Week of 12/3100.0*Chance in playoffs100.0*Average seed
AJ 83.18 Justin 72.62 +18.8
+0.2
Harry 125.26 Tom 96.36 +18.7
+1.3
Joe 86.58 Jason 95.2 +6.2
+0.3
Josh 113.54 Kellen 138.98 -6.2
-0.1
Mark 110.42 Amber 70.5 -0.1
Games Above .500
Chance Will Make Playoffs