How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 10/27100.0*Chance in playoffs100.0*Average seed
Milvia 60 Brandon 63 +0.5
+0.6
Kemahl 84 Avery 119 -0.1
-0.1
Matt 66 Ali 79 -0.1
+0.0
Diblasi 97 Andino 81 +0.1
If winner is:HomeTieAway
Week of 11/3100.0*Chance in playoffs100.0*Average seed
Brandon vs Spencer+0.4+0.2-0.1
+0.7+0.1-0.2
Ali vs Milvia-0.1+0.0+0.1
+0.1-0.1-0.1

What If

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

Games Above .500
Chance Will Make Playoffs