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
Mt. Sinai 68 Sachem East 58 +1.9
+0.1
Comsewogue 64 Lindenhurst 65 +1.8
ESM 47 Smithtown East 57 -1.2
-0.1
Sachem North 53 BBP 62 +1.1
+0.1
Centereach 56 PatchMed 62 -1.0
-0.0
Lindenhurst 77 PatchMed 81 -0.9
Sachem North 48 Pierson 38 -0.7
-0.1
Central Islip 62 Newfield 58 +0.5
Smithtown East 72 Floyd 44 -0.5
Copiague 54 Commack 63 +0.4
Longwood 54 Southampton 66 +0.0

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
107-0In0017223425920010,236
96-199.9%000314283018610081,742
85-284.8001619312712300276,217
74-323.000015173129143000506,899
63-40.20029263521510545,661
52-5Out00110293619400343,421
41-6Out0210283520510118,137
30-7Out019293821316,891
Total:23.4%000000112469101112131295321001,899,204
Games Above .500
Chance Will Make Playoffs