How are these numbers calculated?

Big Games

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

Week of 2/22100.0*Relegated100.0*Average seed
Aberdeen 1 Ross County 2 -1.3
+0.4
Hamilton Accies 0 Motherwell 0 -0.7
+0.0
Motherwell 1 St Mirren 2 -0.2
St Johnstone 2 Rangers 2 -0.0
Week of 3/3100.0*Relegated100.0*Average seed
Motherwell 4 Ross County 1 -0.2
St Mirren 0 St Johnstone 0 +0.0
Week of 3/7100.0*Relegated100.0*Average seed
St Mirren 1 Hearts 0 -0.6
Ross County 0 Rangers 1 -0.1
Celtic 5 St Mirren 0 +0.1
Points
Chance Will Win Championship