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
Greg 89.5 Dan 107.5 -20.2
-1.1
Forrest 88.5 Kaitlyn 62.5 +1.6
+0.1
Kelsey 98.5 Ben 109.5 +0.9
+0.1
Mark Sellers 141.5 Tom 72.5 -0.7
+0.1
Kyle 106.5 Mark 52.5 -0.0
Doug 76 Lisa 83 +0.2
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Greg 112.5 Lisa 108 +23.7
+0.8
Forrest 120.5 Dan 102 -4.7
-0.1
Kelsey 92 Tom 109.5 -3.0
Mark Sellers 92.5 Kaitlyn 91.5 +0.6
-0.1
Doug 96.5 Mark 45 -0.0
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Mark vs Greg-74.5In
-1.9+0.3
Lisa vs Forrest+3.4-1.8
+0.1-0.0
Kaitlyn vs Kelsey+2.5-1.9
+0.1-0.1
Dan vs Mark Sellers+0.6-0.3
Tom vs Kyle-0.5+0.3

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
7.51-0-0In18552744,034,287
6.50-1-015.2%1548376,105,121
Total:89.7%1648266450,139,408
Games Above .500
Chance Will Make Playoffs