How are these numbers calculated?

Big Games

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

Week of 9/13100.0*Chance in playoffs100.0*Average seed
Battery 1 RailHawks 2 +14.9
+0.6
RailHawks 1 Rhinos 1 -5.7
-0.1
Thunder 4 Battery 0 -4.9
-0.2
Sounders 1 Silverbacks 1 +0.8
Islanders 1 Silverbacks 1 +0.7
Miami FC 1 Rhinos 0 +0.3
-0.1
Week of 9/20100.0*Chance in playoffs100.0*Average seed
RailHawks 1 Timbers 0 +24.4
+1.1
Thunder 3 Impact 1 Out
-0.2
Miami FC 1 Silverbacks 0 +8.8
+0.3
Points
Chance Will Make Playoffs