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
Velma Jackson vs East Side-12.7+17.0
-0.6+0.8
Yazoo County vs Elzy+0.4-0.6
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
East Side vs Humphreys County+12.8-17.1
+0.6-0.8
Ruleville Central vs Yazoo County-0.4+0.5
Elzy vs Velma Jackson-0.3+0.5

What If

Chances based on how well the East Side finish out the regular season.   Explain

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In10041,209,476
44-1In70291200,205,540
33-299.8%93941110385,372,472
22-352.701141399363,063,892
11-41.012970167,750,596
00-5Out10030,971,276
Total:68.9%1817171616151,188,573,252
Games Above .500
Chance Will Make Playoffs