How are these numbers calculated?

Big Games

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

Week of 5/7100.0*Average seed
Rio Ave 0 Benfica 1 -0.1
Marítimo 1 Porto 1 -0.0
Week of 5/14100.0*Average seed
Chaves 2 Rio Ave 2 -0.1
Feirense 2 Sporting CP 1 -0.1
Week of 5/21100.0*Average seed
Vitória Guimarães 0 Feirense 1 -0.4
Rio Ave 2 Belenenses 0 +0.2
Paços de Ferreira 0 Marítimo 0 -0.1
Points
Chance Will Win Championship