How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 11/9100.0*Chance in playoffs100.0*Average seed
Brandon 82.5 Sara 89.2 -8.6
-1.0
Michael 88.3 Dan 109.9 +2.0
+0.1
Mark 87.2 Ryan 78.7 +0.9
+0.0
Jake 119.2 Derek 108.6 +0.8
+0.1
David 74.9 Josh 101.1 -0.4
-0.0
Jonathan 113.2 Andrew 131.5 -0.1
+0.0
If winner is:HomeAway
Week of 11/16100.0*Chance in playoffs100.0*Average seed
Andrew vs Brandon-3.2+8.8
-0.5+1.3
Ryan vs Jake-2.4+1.2
-0.1+0.0
Josh vs Mark-2.8+0.3
-0.1+0.0
Sara vs Michael+0.2-0.2
Derek vs Jonathan-0.1+0.2
Dan vs David-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
73-058.0%58357001,749,104
62-13.741837329108,883,078
51-2Out02163432141013,674,034
40-3Out114473276,547,240
Total:4.4%4712161817167130,853,456
Games Above .500
Chance Will Make Playoffs