How are these numbers calculated?

Big Games

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

Week of 10/10100.0*Chance in playoffs100.0*Average seed
Revolution 0 Crew 1 +1.1
+0.1
Real Salt Lake 2 Red Bulls 0 -0.8
Chivas USA 2 Wizards 0 +0.8
-0.1
Toronto FC 1 Earthquakes 1 +0.5
+0.0
Week of 10/17100.0*Chance in playoffs100.0*Average seed
Wizards 2 Sounders 3 In
+1.0
FC Dallas 2 Rapids 1 -2.0
+0.0
DC United 1 Crew 0 -1.4
Toronto FC 1 Real Salt Lake 0 -0.2
+0.0
Revolution 0 Fire 0 +0.1
Week of 10/22100.0*Chance in playoffs100.0*Average seed
Sounders 2 FC Dallas 1 +1.7
Chivas USA 2 Dynamo 3 -0.7
Galaxy 2 Earthquakes 0 -0.5
Fire 1 Chivas USA 0 +0.1
Points
Chance Will Make Playoffs