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 104.68 Ethan 100.76 +10.4
+0.6
Justin 73 Riley 130.16 +3.8
+0.2
Tom H 81.9 Shara 100.3 +3.4
+0.1
Jenn 121.52 Dave 114.46 -2.6
+0.1
Eric 95.94 Tom K 95.72 +0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Justin 80.66 Laurel 101.48 +21.6
+1.2
Jenn 100.28 Tom K 107.62 -8.0
-0.2
Erica 104.54 Tom H 64.7 +1.4
+0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Tom H vs LaurelOut+44.4
-2.4+2.4
Justin vs Tom K-5.6+5.6
-0.6+0.6
Jenn vs Riley-5.6+5.6
+0.1-0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
81-088.8%7811115,142,247
70-1Out24765,138,897
Total:44.4%396173810,281,144
Games Above .500
Chance Will Make Playoffs