How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Chance in playoffs100.0*Average seed
Ethan 111.1 Shawn 96.48 In
+0.2
Laurel 94.74 Jenn 97.14 -0.2
+0.2
Shara 71.8 Tom H 63.14 -0.0
Dave 93.34 Eric 88.58 +0.1
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Erica vs Ethan-0.4+0.2
Jenn vs Eric+0.2-0.1
Laurel vs Riley-0.1+0.1

What If

Chances based on how well the Ethan finish out the regular season.   Explain

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
102-0In267423,796,192
91-1In2772121,558,116
80-2In225222404,785,100
Total:In13701420050,139,408
Games Above .500
Chance Will Make Playoffs