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 +19.1
+1.1
Shara 71.8 Tom H 63.14 -3.8
-0.1
Ethan 111.1 Shawn 96.48 +3.5
+0.1
Tom K 52.98 Riley 68.8 -2.3
-0.1
Dave 93.34 Eric 88.58 -1.1
-0.1
Justin 117.72 Erica 70.68 +0.5
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Jenn vs Eric+19.3-19.3
+1.0-1.0
Laurel vs Riley+3.8-3.8
Erica vs Ethan-3.1+3.1
-0.1+0.1
Justin vs Tom K-2.2+2.2
-0.2+0.2
Dave vs Tom H-1.2+1.2
-0.1+0.1
Shara vs Shawn-0.5+0.5
-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
82-0In115032604,178,722
71-194.7%52840215108,354,915
60-219.031632321514,179,499
Total:77.1%3152222151084016,713,136
Games Above .500
Chance Will Make Playoffs