How are these numbers calculated?

Big Games

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

If winner is:HomeAway
Week of 10/2100.0*Chance in playoffs100.0*Average seed
Bay vs Pass Christian-13.3+17.8
-0.6+0.8
St. Stanislaus vs Vancleave-0.5+0.7
East Central vs Moss Point-0.4+0.5
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Pass Christian vs East Central+14.0-18.7
+0.6-0.8
St. Stanislaus vs Bay-0.5+0.7

What If

Chances based on how well the Pass Christian finish out the regular season.   Explain

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In100324,131,676
44-1In702911,755,898,793
33-299.8%939411103,800,605,127
22-352.7011413994,033,964,800
11-41.0129702,095,578,736
00-5Out100431,308,608
Total:64.4%15161617171812,441,487,740
Games Above .500
Chance Will Make Playoffs