How are these numbers calculated?

Big Games

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

Week of 4/23100.0*Average seed
Guimaraes 2 Belenenses 0 +0.4
CD Nacional 1 Paços Ferreira 1 +0.1
Naval 1º de Maio 0 Braga 4 +0.1
UD Leiria 1 Sporting Lisbon 1 +0.0
Rio Ave 0 Maritimo 0 +0.0
Week of 5/2100.0*Average seed
Rio Ave 0 Guimaraes 0 +0.0
Académica 3 CD Nacional 3 +0.0
Week of 5/9None
Points
Chance Will Win Championship