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*Average seed
Hibernian 1 St. Johnstone 2 +0.5
Aberdeen 1 Inverness CT 0 -0.1
St. Mirren 0 Hamilton 1 +0.0
Week of 5/7100.0*Average seed
Aberdeen 0 St. Johnstone 2 +0.6
St. Johnstone 1 Hamilton 0 +0.3
Hamilton 1 Hibernian 0 +0.2
Inverness CT 2 Hibernian 0 +0.1
Aberdeen 0 St. Mirren 1 +0.0
Motherwell 1 Kilmarnock 1 +0.0
Week of 5/14100.0*Average seed
St. Mirren 0 St. Johnstone 0 -0.1
Points
Chance Will Win Championship