How are these numbers calculated?

Big Games

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

Week of 12/27100.0*Chance in playoffs100.0*Average seed
Sachem North 48 Pierson 38 +0.8
Center Moriches 81 Pierson 50 +0.4
Mattituck 87 Greenport 45 -0.2
-0.0

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
65-079.4%79217,583
54-125.9267484,632
43-22.12971352,272
32-3Out991675,812
21-4Out8317593,709
10-5Out3763185,196
Total:1.9%286121,899,204
Games Above .500
Chance Will Make Playoffs