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
Steve 99.14 Nick 11 +1.2
+1.0
John 154.1 Roger 11 -0.4
Chris 127.42 Nana 11 +0.0
Andy 94.74 Evan 11 -0.2
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Evan 11 Steve 20 +10.2
+1.4
Ryan 11 Chuck 20 -2.8
-0.1
Nana 11 Roger 20 -0.7
+0.1
Ryan 11 John 20 +0.3
-0.3
Week of 11/27100.0*Chance in playoffs100.0*Average seed
Chris 11 Ryan 27 -5.5
-0.2
Chuck 11 Andy 27 +3.9
-0.3
John 11 Evan 27 -2.1
Bobby 11 Nana 27 -1.4
-0.5
Steve 11 Jordan 27 -0.4
-0.0
Roger 11 Nick 27 +0.3
+0.0
Games Above .500
Chance Will Make Playoffs