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+15.4-15.3
+0.7-0.7
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Elzy vs Velma Jackson-15.3+15.3
-0.7+0.7

What If

Chances based on how well the Velma Jackson finish out the regular season.   Explain

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In10012,531,601
44-1In7029161,851,976
33-299.8%83942110123,702,759
22-353.101142398123,703,513
11-41.01297061,862,065
00-5Out10012,539,170
Total:66.7%171717171717396,191,084
Games Above .500
Chance Will Make Playoffs