How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Chance in playoffs100.0*Average seed
Chris 127.42 Nana 11 -3.7
-0.4
Steve 99.14 Nick 11 +2.7
-0.1
John 154.1 Roger 11 +2.3
Andy 94.74 Evan 11 +0.7
Bobby 142.28 Chuck 11 +0.1
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Nana 11 Roger 20 -5.1
-1.0
Ryan 11 Chuck 20 -0.5
Evan 11 Steve 20 +0.5
-0.1
Ryan 11 John 20 +0.2
-0.3
Andy 11 Jordan 20 +0.0
Week of 11/27100.0*Chance in playoffs100.0*Average seed
Bobby 11 Nana 27 +12.1
+2.3
Chris 11 Ryan 27 -0.5
John 11 Evan 27 -0.3
+0.1
Roger 11 Nick 27 -0.2
Chuck 11 Andy 27 -0.5
Games Above .500
Chance Will Make Playoffs