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
-0.1
Center Moriches 81 Pierson 50 -0.4
-0.1
Mattituck 87 Greenport 45 +0.2

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
74-0In496280,659
63-1In0100757,303
52-299.5%991634,620
41-389.69010204,512
30-450.05049122,110
Total:98.1%198201,899,204
Games Above .500
Chance Will Make Playoffs