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 -0.2
Naval 1º de Maio 0 Braga 4 +0.1
CD Nacional 1 Paços Ferreira 1 +0.1
UD Leiria 1 Sporting Lisbon 1 +0.0
Week of 5/2100.0*Average seed
Belenenses 5 UD Leiria 2 +0.1
Braga 1 Paços Ferreira 0 +0.1
Sporting Lisbon 0 Naval 1º de Maio 1 -0.1
Académica 3 CD Nacional 3 +0.1
Week of 5/9100.0*Average seed
Naval 1º de Maio 0 Académica 1 +0.2
CD Nacional 1 Braga 1 +0.1
Points
Chance Will Win Championship