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 +21.8
+0.5
Chattanooga 2 Orlando B 1 -5.5
-0.1
Tucson 0 Richmond 0 +4.8
+0.1
Tucson 2 Greenville 3 +2.0
-0.1
Lansing 1 South Georgia 1 +1.9
+0.0
Greenville 3 Toronto II 1 -1.3
-0.1
Week of 9/27100.0*Chance in playoffs100.0*Average seed
Chattanooga 2 Richmond 1 -14.7
-0.1
Toronto II 1 South Georgia 0 +1.4
Tucson 1 Madison 1 +0.7
-0.0
Greenville 0 Orlando B 1 +0.1
Week of 10/4100.0*Chance in playoffs100.0*Average seed
Chattanooga 1 Toronto II 1 In
+0.2
Lansing 0 Madison 1 In
+0.4
South Georgia 3 Greenville 1 +0.2
Points
Chance Will Make Playoffs