How are these numbers calculated?

Big Games

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

Week of 9/20100.0*Chance in playoffs100.0*Average seed
Madison 1 North Texas 0 -20.1
-0.3
Chattanooga 2 Orlando B 1 +9.9
+0.4
Tucson 0 Richmond 0 +3.5
+0.1
Greenville 3 Toronto II 1 -1.3
Tucson 2 Greenville 3 -0.6
+0.1
Lansing 1 South Georgia 1 +0.3
Week of 9/27100.0*Chance in playoffs100.0*Average seed
Chattanooga 2 Richmond 1 +19.0
+0.4
Tucson 1 Madison 1 +2.2
+0.0
Toronto II 1 South Georgia 0 +0.5
+0.1
Week of 10/4100.0*Chance in playoffs100.0*Average seed
Chattanooga 1 Toronto II 1 Out
-0.4
Lansing 0 Madison 1 Out
-0.4
Points
Chance Will Make Playoffs