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*Chance wins title100.0*Average seed
Rio Ave 0 Benfica 1 +13.8
+0.1
Marítimo 1 Porto 1 +5.0
+0.0
Sporting CP 1 Belenenses 3 -0.1
Week of 5/14100.0*Chance wins title100.0*Average seed
Porto 4 Paços de Ferreira 1 -7.6
-0.1
Benfica 5 Vitória Guimarães 0 Yes
Week of 5/21None
Points
Chance Will Win Championship