How are these numbers calculated?

Big Games

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

Week of 5/6100.0*Average seed
Partick Thistle 1 Rangers 2 -0.3
Hearts 1 Aberdeen 2 +0.1
Kilmarnock 0 Dundee 1 +0.1
Motherwell 0 Ross County 1 -0.1
Week of 5/13100.0*Average seed
Partick Thistle 0 Celtic 5 -0.5
St. Johnstone 1 Partick Thistle 0 -0.3
Ross County 3 Hamilton 2 -0.2
Motherwell 3 Kilmarnock 1 +0.2
Kilmarnock 2 Inverness CT 1 -0.1
Rangers 2 Hearts 1 +0.1
St. Johnstone 1 Hearts 0 +0.1
Dundee 1 Ross County 1 +0.1
Dundee 0 Inverness CT 2 +0.0
Week of 5/20100.0*Average seed
Kilmarnock 1 Ross County 2 -0.1
Points
Chance Will Win Championship