How are these numbers calculated?

Big Games

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

Week of 4/30100.0*Relegated100.0*Average seed
St. Mirren 0 Hamilton 1 -2.8
Week of 5/7100.0*Relegated100.0*Average seed
Aberdeen 0 St. Mirren 1 +12.3
-0.1
St. Johnstone 1 Hamilton 0 +12.2
-0.1
Hamilton 1 Hibernian 0 -5.3
+0.1
Inverness CT 1 St. Mirren 0 -4.4
Week of 5/14None
Points
Chance Will Win Championship