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
Humphreys County vs Ruleville Central+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
East Side vs Humphreys County-12.4+16.5
-0.6+0.8
Elzy vs Velma Jackson-0.3+0.5
Ruleville Central vs Yazoo County+0.1-0.2

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In10041,202,958
44-1In70291200,191,149
33-299.8%93941110385,393,398
22-352.701141399363,088,468
11-41.012970167,734,220
00-5Out10030,963,059
Total:68.9%1817171616151,188,573,252
Games Above .500
Chance Will Make Playoffs