How are these numbers calculated?

Big Games

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

Week of 4/22None
Week of 4/29100.0*Average seed
Dundee Utd 0 Dunfermline 1 -0.9
Dundee Utd 0 Falkirk 2 -0.2
Inverness CT 2 Falkirk 0 +0.1
Motherwell 2 Dunfermline 3 -0.1
Week of 5/6100.0*Average seed
Motherwell 1 Dundee Utd 1 +0.4
Falkirk 1 Livingston 0 -0.3
Dunfermline 0 Inverness CT 1 +0.2
Points
Chance Will Win Championship