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
Tom H 81.9 Shara 100.3 +10.9
+0.5
Jenn 121.52 Dave 114.46 -4.4
-0.1
Justin 73 Riley 130.16 +1.7
+0.1
Laurel 104.68 Ethan 100.76 -0.7
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Ethan 114.22 Shara 122.28 In
+1.2
Justin 80.66 Laurel 101.48 -0.6
Erica 104.54 Tom H 64.7 +0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Erica vs Shara-2.0+2.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
101-0In1005,140,789
90-1In1995,140,355
Total:In505010,281,144
Games Above .500
Chance Will Make Playoffs