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
Jordan 108.14 Ryan 11 +16.3
+1.2
Bobby 142.28 Chuck 11 +1.6
+0.1
John 154.1 Roger 11 +1.5
+0.1
Steve 99.14 Nick 11 +1.2
+0.1
Andy 94.74 Evan 11 +0.9
Chris 127.42 Nana 11 +0.2
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Andy 11 Jordan 20 +9.9
+0.9
Ryan 11 Chuck 20 -0.4
Bobby 11 Chris 20 -0.4
-0.2
Evan 11 Steve 20 -0.1
Nana 11 Roger 20 +0.1
Ryan 11 John 20 +0.1
Week of 11/27100.0*Chance in playoffs100.0*Average seed
Chuck 11 Andy 27 In
+0.1
Steve 11 Jordan 27 In
+0.6
Chris 11 Ryan 27 -0.3
+0.1
Games Above .500
Chance Will Make Playoffs