How are these numbers calculated?

Big Games

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

Week of 10/14100.0*Chance in playoffs100.0*Average seed
Tom Martell 1 David Williams 0 -14.4
-0.6
Eric Froehlich 0 Rich Shay 1 +8.5
Chris Pikula 0 Luis Scott-Vargas 1 +1.5
+0.0
Steve Menendian 0 Bob Maher 1 +0.2
Randy Buehler 0 Josh Utter-Leyton 1 +0.1
If winner is:HomeAway
Week of 10/21100.0*Chance in playoffs100.0*Average seed
Eric Froehlich vs David Williams-10.2+16.3
-0.6+1.0
Tom Martell vs Josh Utter-Leyton-2.6+6.6
Chris Pikula vs Bob Maher-1.5+3.9
Rich Shay vs Luis Scott-Vargas-2.1+0.4
-0.3+0.1
Randy Buehler vs Steve Menendian+0.7-0.2
-0.1+0.0

What If

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

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910Count
52-041.3%08334513110,323,275
41-10.9019493920022,737,188
30-2Out5364215110,054,037
Total:10.3%028163029114043,114,500
Games Above .500
Chance Will Make Playoffs