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
Ross County 0 St. Johnstone 1 +0.9
Inverness CT 2 Dundee Utd 3 +0.2
Dundee 2 Dundee Utd 1 -0.1
Aberdeen 4 Motherwell 1 +0.1
Partick Thistle 1 Inverness CT 4 -0.1
Week of 5/7100.0*Average seed
Motherwell 1 St. Johnstone 2 +0.6
Dundee 0 Hamilton 1 +0.2
St. Johnstone 2 Celtic 1 +0.2
Dundee 1 Kilmarnock 1 +0.1
Hamilton 0 Inverness CT 1 -0.1
Hearts 1 Ross County 1 +0.0
Week of 5/14None
Points
Chance Will Win Championship