How are these numbers calculated?

Big Games

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

Week of 11/9100.0*Chance in playoffs100.0*Average seed
Purvis 81.4 McNichols 87.3 +2.1
+0.2
Barnett 123.8 Vanzant 147.1 -0.4
Metheny 85.6 M Crouch 89.7 -0.1
-0.1
Smith 131.4 S Crouch 97.7 +0.1
-0.1
If winner is:HomeAway
Week of 11/16100.0*Chance in playoffs100.0*Average seed
McNichols vs BarnettIn-9.4
+0.1-0.7
Vanzant vs Smith-0.8In
+0.1-0.1
M Crouch vs Purvis-0.0+0.1
-0.1+0.3
Salsberry vs Metheny-0.0+0.1

What If

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

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910Count
92-0In5742250,684,475
81-1In013493730,760,298
70-265.9%164343,427,447
Total:98.6%3493116184,872,220
Games Above .500
Chance Will Make Playoffs