How are these numbers calculated?

Big Games

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

Week of 9/8100.0*Chance in playoffs100.0*Average seed
Colorado II 2 Salt Lake II 0 Out
-0.5
Vancouver II 0 St Louis II 1 +0.1
+0.2
Portland II 1 Houston II 3 +0.2
Week of 9/15100.0*Chance in playoffs100.0*Average seed
Salt Lake II 0 Tacoma 3 -0.5
Houston II 1 North Texas 3 -0.3
LAFC II 4 Portland II 0 +0.2
Vancouver II 2 San Jose II 5 +0.1
Week of 9/24100.0*Chance in playoffs100.0*Average seed
Portland II 2 Salt Lake II 1 -1.0
Tacoma 4 Vancouver II 3 (so)+0.1
Points
Chance Will Make Playoffs