How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Chance in playoffs100.0*Average seed
Rob 115 Jason 88 +6.0
+1.0
Adam 85.5 William 147 -0.9
-0.1
Tyler 93 Peter 67 +0.9
+0.2
Kevin 54.5 Greg 88.5 -0.3
-0.1
Chris 61 Eric 72 -0.1
Week of 11/29100.0*Chance in playoffs100.0*Average seed
Eric 83 Rob 84.5 In
+0.6
Jason 101 Kevin 122.5 +0.5
+0.1
Peter 122 Adam 119 -0.5
+0.1
Week of 12/6100.0*Chance in playoffs100.0*Average seed
Chris 108 Rob 100.5 -1.4
William 127 Jason 137.5 +0.4
Adam 107 Tyler 123.5 +0.2
Games Above .500
Chance Will Make Playoffs