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
Nathan 149 Jeff 97 +1.8
+0.2
Tim 105 David 86 +0.8
+0.4
Stephen 129 Mat 89 -0.1
-0.1
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Tim 126 Mat 110 +5.8
+0.2
Nathan 194 Stephen 207 -3.5
-0.1
David 137 Jeff 168 +3.1
+0.1
Games Above .500
Chance Will Make Playoffs