How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Chance in playoffs100.0*Average seed
Tim 105 David 86 -19.5
-0.8
Nathan 149 Jeff 97 +11.3
+0.2
Ben 120 Charlie 135 +1.4
+0.1
Stephen 129 Mat 89 -0.1
-0.0
Clint 170 Travis 131 -0.0
Week of 11/26100.0*Chance in playoffs100.0*Average seed
David 137 Jeff 168 Out
-1.2
Nathan 194 Stephen 207 -2.0
-0.1
Tim 126 Mat 110 -1.6
-0.1
Games Above .500
Chance Will Make Playoffs