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
Jenn 121.52 Dave 114.46 +17.2
+0.5
Laurel 104.68 Ethan 100.76 -3.3
-0.1
Tom H 81.9 Shara 100.3 +0.8
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Justin 80.66 Laurel 101.48 -17.1
-0.1
Jenn 100.28 Tom K 107.62 -15.6
-1.1
Erica 104.54 Tom H 64.7 +4.1
Ethan 114.22 Shara 122.28 -2.6
-0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Jenn vs Riley+30.6Out
+0.3-0.3
Justin vs Tom K-19.4+19.4
-0.2+0.2
Tom H vs Laurel-5.6+5.6
-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
81-061.2%61395,138,505
70-1Out1005,142,639
Total:30.6%316910,281,144
Games Above .500
Chance Will Make Playoffs