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
Laurel 94.74 Jenn 97.14 +27.1
+1.1
Ethan 111.1 Shawn 96.48 +3.5
+0.1
Shara 71.8 Tom H 63.14 -2.7
-0.1
Dave 93.34 Eric 88.58 -1.8
-0.1
Justin 117.72 Erica 70.68 +1.8
Tom K 52.98 Riley 68.8 -1.3
-0.1
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Jenn vs Eric+20.6-7.3
+1.1-0.4
Laurel vs Riley+4.3-7.9
+0.1-0.1
Erica vs Ethan-7.1+2.7
-0.2+0.1
Justin vs Tom K-1.0+2.7
-0.1+0.3
Dave vs Tom H-0.9+1.9
-0.0+0.1
Shara vs Shawn-0.9+1.2
-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
82-0In226541717,562,993
71-197.3%123492430026,873,364
60-232.652737236015,703,051
Total:77.5%042031221372050,139,408
Games Above .500
Chance Will Make Playoffs