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
Admira 2 Altach 1 +0.4
Wolfsberger 2 Mattersburg 0 -0.1
Sturm Graz 0 Ried 0 +0.0
Week of 5/8100.0*Average seed
Austria Wien 3 Admira 1 -0.4
Wolfsberger 1 Admira 2 +0.4
Altach 1 Wolfsberger 1 +0.1
Sturm Graz 1 Mattersburg 1 +0.0
Salzburg 1 Sturm Graz 1 +0.0
Week of 5/15100.0*Average seed
Austria Wien 3 Sturm Graz 0 +0.2
Admira 1 Rapid Wien 3 -0.1
Points
Chance Will Win Championship