How are these numbers calculated?

Big Games

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

Week of 10/12100.0*Chance in playoffs100.0*Supporters Shield100.0*Average seed
Timbers 1 Sounders 0 +0.8
+11.8
+0.6
Galaxy 1 Impact 0 -1.2
-0.1
Sporting KC 1 DC United 0 -1.6
Impact 0 New England 1 +0.3
Week of 10/19100.0*Chance in playoffs100.0*Supporters Shield100.0*Average seed
FC Dallas 2 Sounders 0 In
+1.4
+0.1
Timbers 0 Real Salt Lake 0 In
-17.7
-0.4
Dynamo 0 Red Bulls 3 -11.5
Galaxy 0 Earthquakes 0 +4.0
+0.2
Real Salt Lake 2 Chivas USA 1 -0.1
Week of 10/26100.0*Chance in playoffs100.0*Supporters Shield100.0*Average seed
Union 1 Sporting KC 2 No
Chivas USA 0 Timbers 5 +5.5
+0.8
Points
Chance Will Make Playoffs