How are these numbers calculated?

Big Games

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

Week of 10/11100.0*Chance in playoffs100.0*Average seed
Houston 2 Kansas City 1 +17.2
+0.8
Portland 4 DC United 0 -0.1
Week of 10/15100.0*Chance in playoffs100.0*Average seed
Kansas City 0 Houston 0 +2.1
+0.0
Colorado 1 Salt Lake 0 +2.1
+0.1
Seattle 4 Dallas 0 +2.0
-0.1
Vancouver 1 San Jose 1 -1.0
-0.0
Week of 10/22100.0*Chance in playoffs100.0*Average seed
Houston 3 Chicago 0 +0.4
Salt Lake 2 Kansas City 1 +0.2
Seattle 3 Colorado 0 -0.1
Points
Chance Will Make Playoffs