How are these numbers calculated?

Big Games

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

Week of 1/31100.0*Chance in playoffs100.0*Average seed
Haftr 100 JEC 50 +8.7
+0.2
Haftr 48 HANC 50 -5.7
-0.5
D. Hatorah 52 SAR 72 +2.7
Magen David 78 SSLI 46 -1.5
Flatbush 71 SSLI 36 +0.7
-0.1
YDE 49 Rambam 31 -0.2
Week of 2/5100.0*Chance in playoffs100.0*Average seed
Magen David 54 YDE 43 -6.3
-0.1
DRS 51 Haftr 48 -3.1
-0.2
Week of 2/12None

What If

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

100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs1234567891011Count
7-8In1006,743,516*
Total:In1006,743,516

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs