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
Yazoo County vs Elzy+13.3-17.8
+0.6-0.8
Velma Jackson vs East Side+0.1-0.2
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Ruleville Central vs Yazoo County-12.7+17.0
-0.6+0.8
East Side vs Humphreys County-0.5+0.6
Elzy vs Velma Jackson+0.1-0.1

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In10041,206,715
44-1In70291200,196,064
33-299.8%93941110385,352,112
22-352.701141399363,104,017
11-41.012970167,749,257
00-5Out10030,965,087
Total:68.9%1817171616151,188,573,252
Games Above .500
Chance Will Make Playoffs