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
Mark Sellers 141.5 Tom 72.5 +22.0
+1.0
Greg 89.5 Dan 107.5 +4.7
+0.1
Kyle 106.5 Mark 52.5 -1.9
-0.1
Forrest 88.5 Kaitlyn 62.5 +1.9
-0.1
Kelsey 98.5 Ben 109.5 +1.8
+0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Mark Sellers 92.5 Kaitlyn 91.5 +30.9
+1.4
Forrest 120.5 Dan 102 -6.3
-0.1
Greg 112.5 Lisa 108 -4.9
-0.2
Doug 96.5 Mark 45 +0.4
Kyle 112.5 Ben 100.5 -0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Dan vs Mark Sellers-18.8In
-0.9+0.9
Lisa vs Forrest+12.5-12.5
+0.3-0.3
Kaitlyn vs Kelsey+9.4-9.4
+0.3-0.3
Mark vs Greg+9.4-9.4
+0.3-0.3
Tom vs Kyle-6.2+6.2
-0.3+0.3
Ben vs Doug-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
81-0-0In75257,711,693
70-1-062.5%622342897,715,035
Total:81.2%41231714515,426,728
Games Above .500
Chance Will Make Playoffs