How are these numbers calculated?

Big Games

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

Week of 9/25100.0*Chance in playoffs100.0*Average seed
Harrison Central 55 George County 26 -12.6
-0.7
If winner is:HomeAway
Week of 10/2100.0*Chance in playoffs100.0*Average seed
George County vs Gulfport+15.7-10.6
+0.8-0.5
D'Iberville vs Ocean Springs+0.4-0.6
Hancock vs St. Martin-0.1+0.2

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
66-0In84150479,788
55-1100.0%284921203,622,216
44-284.91113538141011,537,160
33-313.60113383612119,085,443
22-40.00221492717,280,940
11-5Out018828,136,533
00-6Out1001,574,928
Total:26.7%258111517202161,717,008
Games Above .500
Chance Will Make Playoffs