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
Mattituck 87 Greenport 45 -4.8
-0.1
Center Moriches 81 Pierson 50 +4.5
Sachem North 48 Pierson 38 +4.1

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
65-087.5%871317,397
54-142.8435785,912
43-26.678212172,568
32-3Out8713173,206
21-4Out505086,220
10-5Out138717,411
Total:11.5%117018552,714
Games Above .500
Chance Will Make Playoffs