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
Ellerbe 89 Segal 90 In
+0.1
Lankford 99 Henderson 85 -0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Bersin 78 Lankford 84 -0.1
Segal 72 Fornshell 56 +0.0
If winner is:HomeTieAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Li vs Segal-0.4+0.1+0.1
Ellerbe vs Lankford+0.1+0.1-0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
10.5-11In10039,028,420*
100-1-0In495113,734,020
Total:In871352,762,440

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs