How are these numbers calculated?

Big Games

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

Week of 11/26100.0*Serie B100.0*Average seed
Coritiba 0 Vitoria 1 +13.8
-0.2
America-MG 2 Sport Recife 2 -1.3
+0.0
Week of 12/11100.0*Serie B100.0*Average seed
Fluminense 1 Internacional 1 Yes
-0.4
Sport Recife 2 Figueirense 0 +15.8
-0.2
Vitoria 1 Palmeiras 2 -7.7
+0.2
Points
Chance Will Win Championship