How are these numbers calculated?

Big Games

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

Week of 9/18100.0*Chance in playoffs100.0*Average seed
St. Louis 2 Aztex 1 +2.0
+0.4
Miami FC 4 St. Louis 2 Out
-0.4
Stars 1 Whitecaps 0 -0.6
Impact 3 Rowdies 0 -0.2
+0.1
Islanders 0 Timbers 1 +0.1
Rowdies 1 Stars 3 +0.2
Baltimore 2 RailHawks 4 +0.1
Week of 9/25100.0*Chance in playoffs100.0*Average seed
Aztex 4 St. Louis 2 -0.3
Miami FC 1 Rhinos 0 -0.3
Rowdies 6 Baltimore 3 -0.1
Week of 10/2100.0*Chance in playoffs100.0*Average seed
Miami FC 1 Islanders 1 -0.1
St. Louis 1 Rhinos 2 -0.1
Points
Chance Will Make Playoffs