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 +1.7
+0.2
Erica 73.98 Shawn 61.7 -1.7
-0.6
Eric 95.94 Tom K 95.72 -0.2
-0.1
Justin 73 Riley 130.16 -0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Eric 74.36 Shawn 103.94 +25.0
+1.9
Erica 104.54 Tom H 64.7 -0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Dave vs ShawnOutIn
-3.8+3.8
Eric vs Ethan-0.2+0.2

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
51-0In1005,139,515
40-1Out41595,141,629
Total:50.0%50203010,281,144
Games Above .500
Chance Will Make Playoffs