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
Justin 117.72 Erica 70.68 +20.2
+0.9
Laurel 94.74 Jenn 97.14 -5.4
-0.2
Ethan 111.1 Shawn 96.48 +2.2
+0.1
Shara 71.8 Tom H 63.14 -1.8
-0.1
Tom K 52.98 Riley 68.8 -1.2
-0.0
Dave 93.34 Eric 88.58 -1.1
-0.1
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Justin vs Tom K+7.2-18.7
+0.4-1.0
Erica vs Ethan-3.8+1.4
Laurel vs Riley+0.8-1.6
-0.1+0.1
Jenn vs Eric-1.6+0.6
-0.3+0.1
Shara vs Shawn+0.6-0.8
-0.0+0.1
Dave vs Tom H-0.4+0.8

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
82-0In230608020,844,756
71-197.8%238411820023,374,298
60-238.05333720505,920,354
Total:91.6%113432312521050,139,408
Games Above .500
Chance Will Make Playoffs