How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Chance in playoffs100.0*Average seed
Laurel 111.2 Riley 84.2 -10.0
-0.4
Jenn 75.58 Eric 99.54 +2.7
+0.1
Erica 60.14 Ethan 78 +2.4
+0.2
Justin 92.66 Tom K 89.34 -1.2
-0.0
Dave 88.54 Tom H 112.22 -0.8
+0.1
Shara 89.14 Shawn 94.36 +0.1
-0.1
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Jenn 86 Riley 84.44 -0.4
Erica 85.38 Dave 97.96 +0.2
Shara 91.96 Ethan 113.3 +0.0
Games Above .500
Chance Will Make Playoffs