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
Marítimo 1 Porto 1 +10.6
+0.1
Rio Ave 0 Benfica 1 +10.4
+0.1
Week of 5/14100.0*Chance wins title100.0*Average seed
Benfica 5 Vitória Guimarães 0 Yes
+0.0
Porto 4 Paços de Ferreira 1 -1.9
Week of 5/21None
Points
Chance Will Win Championship