How are these numbers calculated?

Big Games

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

Week of 4/28100.0*Relegated100.0*Average seed
Motherwell 2 Dundee 1 No
+0.3
St Johnstone 1 Partick Thistle 1 +0.1
Week of 5/5100.0*Relegated100.0*Average seed
Motherwell 1 St Johnstone 5 -0.4
Partick Thistle 0 Motherwell 1 +0.3
Hamilton 1 St Johnstone 2 -0.2
Hearts 2 Hibernian 1 -0.2
Hearts 1 Celtic 3 +0.0
Week of 5/12100.0*Relegated100.0*Average seed
Motherwell 3 Hamilton 0 +0.3
St Johnstone 1 Ross County 1 +0.1
Points
Chance Will Win Championship