How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Serie C100.0*Average seed
Criciuma 2 Gama 0 Yes
-0.3
Sao Caetano 1 America-RN 2 +1.0
Gremio Barueri 1 Fortaleza 0 -0.5
+0.1
Parana 1 Ponte Preta 0 +0.1
Brasiliense 2 Juventude 2 +0.1
Week of 11/21100.0*Serie C100.0*Average seed
Ceara 1 Gama 0 -0.1
Week of 11/28None
Points
Chance Will Win Championship