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 +0.2
+0.9
Jake 119.2 Derek 108.6 +0.0
Michael 88.3 Dan 109.9 -0.1
Jonathan 113.2 Andrew 131.5 +0.1
If winner is:HomeAway
Week of 11/16100.0*Chance in playoffs100.0*Average seed
Sara vs Michael+0.9-0.9
+1.1-1.1
Ryan vs Jake-0.7+0.4
Josh vs Mark-0.7+0.1
-0.1+0.0
Andrew vs Brandon+0.1-0.3
+0.1-0.2
Derek vs Jonathan-0.1+0.2
-0.1+0.1
Dan vs David-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
73-030.9%31491820650,025
62-11.1113383791009,480,720
51-2Out02143333162014,780,235
40-3Out63941145,942,476
Total:1.0%1513181917159330,853,456
Games Above .500
Chance Will Make Playoffs