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
East Webster vs Calhoun City+15.3-15.3
+0.7-0.7
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Winona vs East Webster-15.3+15.3
-0.7+0.7

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In1002,930,613
44-1In7029114,455,485
33-299.8%8394211028,917,147
22-353.10114238828,917,066
11-41.01297014,457,202
00-5Out1002,933,227
Total:66.7%17171717171792,610,740
Games Above .500
Chance Will Make Playoffs