How are these numbers calculated?

Big Games

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

Week of 11/10100.0*Chance in playoffs100.0*Average seed
Kelso 164 Drennon 198 -9.0
-0.3
Pollard 117 Henley 144 +5.5
+0.2
Crouch 149 Best 108 -3.4
-0.1
Smith 132 Johanson 149 +2.2
+0.0
Tipps 139 Taylor 128 -0.3
-0.1
Week of 11/17100.0*Chance in playoffs100.0*Average seed
Drennon 132 Henley 140 +11.1
Best 113 Pollard 138 -7.0
-1.0
Smith 153 Crouch 118 -1.0
-0.2
Johanson 119 Tipps 83 +0.2
+0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Best 136 Smith 150 -0.2
Henley 146 Tipps 96 -0.0
Games Above .500
Chance Will Make Playoffs