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 +6.3
+0.5
Tim 105 David 86 +2.3
+0.1
Stephen 129 Mat 89 +0.3
+0.1
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Nathan 194 Stephen 207 +6.1
+0.1
David 137 Jeff 168 +4.1
+0.1
Tim 126 Mat 110 -3.6
-0.1
Games Above .500
Chance Will Make Playoffs