How are these numbers calculated?

Big Games

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

Week of 2/2100.0*Chance in playoffs100.0*Average seed
Flatbush 43 Rambam 31 -3.1
Flatbush 78 DRS 68 -1.2
Haftr 43 North Shore 40 -0.8
-0.9
JEC 64 Magen David 79 +0.8
-0.1
YDE 45 Rambam 31 -0.4
-0.1
HANC 65 Ezra 25 -0.1
If winner is:HomeAway
MTA vs FlatbushIn-6.3
+0.1-0.1
Shaare T. vs North Shore-6.3In
-0.3+0.3
If winner is:HomeAway
Week of 2/9100.0*Chance in playoffs100.0*Average seed
Magen David vs FlatbushIn-6.3
Magen David vs North Shore-6.2In
-0.4+0.4
YDE vs Magen David-0.1+0.1

What If

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

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910Count
72-0In28721,364,345
61-1In63372,727,820
50-275.0%75251,364,955
Total:93.7%7493765,457,120
Games Above .500
Chance Will Make Playoffs