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 +30.1
+0.9
Thunder 4 Battery 0 -8.4
-0.2
RailHawks 1 Rhinos 1 -7.7
-0.1
Islanders 1 Silverbacks 1 -2.6
-0.1
Sounders 1 Silverbacks 1 -0.9
-0.1
Miami FC 1 Rhinos 0 +0.5
-0.1
Whitecaps 1 Impact 0 -0.1
Week of 9/20100.0*Chance in playoffs100.0*Average seed
RailHawks 1 Timbers 0 +21.9
+0.8
Thunder 3 Impact 1 Out
-0.3
Miami FC 1 Silverbacks 0 +6.5
+0.2
Points
Chance Will Make Playoffs