How are these numbers calculated?

Big Games

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

Week of 5/4100.0*Relegated100.0*Average seed
Dundee 0 Hamilton Accies 1 No
Motherwell 1 St Mirren 1 -0.2
Week of 5/11None
Week of 5/18100.0*Relegated100.0*Average seed
Hamilton Accies 2 St Johnstone 0 No
+0.5
Dundee 2 St Mirren 3 +16.6
-0.3
Points
Chance Will Win Championship