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
Biloxi vs Harrison Central-15.4+11.0
-0.8+0.5
D'Iberville vs Ocean Springs+0.4-0.6
George County vs Gulfport-0.4+0.3
Hancock vs St. Martin+0.0-0.1

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
76-0In1001,555,095
65-1In801908,124,461
54-2100.0%2650222017,328,549
43-387.41123837121019,091,135
32-415.90115383411111,522,194
21-50.0022149293,614,259
10-6Out01584481,315
Total:73.8%212018151185261,717,008
Games Above .500
Chance Will Make Playoffs