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 48 HANC 50 -1.8
-0.4
Haftr 100 JEC 50 +1.6
+0.0
D. Hatorah 52 SAR 72 +0.4
Flatbush 71 SSLI 36 +0.1
-0.0
Week of 2/5100.0*Chance in playoffs100.0*Average seed
Magen David 54 YDE 43 -4.3
Magen David 67 North Shore 35 +1.3
DRS 51 Haftr 48 -0.3
-0.0
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
7-8In10021,195,336*
Total:In10021,195,336

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs