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
Center Moriches 81 Pierson 50 +11.6
+0.4
Center Moriches 98 BBP 55 +10.8
+0.4
Southold 76 Port Jefferson 55 +3.3
+0.1
Riverhead 58 Southampton 62 -2.5
-0.1
Mattituck 87 Greenport 45 -2.2
-0.1
Longwood 54 Southampton 66 -2.1
-0.1
Hampton Bays 77 Westhampton 71 -1.5
-0.1
Mattituck 95 Shelter Island 49 -1.5
-0.1

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
105-0In10017,429
94-1In96486,238
83-2In63352173,062
72-391.1%2365390172,151
61-420.1020592186,424
50-50.302174417,410
Total:81.6%3923201360552,714
Games Above .500
Chance Will Make Playoffs