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
Erica 60.14 Ethan 78 Out
-1.9
Shara 89.14 Shawn 94.36 +4.6
+0.1
Jenn 75.58 Eric 99.54 +0.5
Laurel 111.2 Riley 84.2 +0.5
+0.1
Dave 88.54 Tom H 112.22 +0.1
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Erica 85.38 Dave 97.96 -0.9
Jenn 86 Riley 84.44 +0.4
Shara 91.96 Ethan 113.3 +0.1
Games Above .500
Chance Will Make Playoffs