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
Sao Caetano 1 America-RN 2 +15.5
-0.3
Gremio Barueri 1 Fortaleza 0 +12.1
-0.4
Criciuma 2 Gama 0 +2.6
-0.1
ABC 1 Marilia 1 +1.8
Parana 1 Ponte Preta 0 +0.1
Brasiliense 2 Juventude 2 -0.1
+0.0
Week of 11/21100.0*Serie C100.0*Average seed
Bragantino 0 Fortaleza 1 -44.1
+1.5
Criciuma 4 Santo Andre 4 -4.9
+0.1
Bahia 2 Marilia 1 -3.6
+0.1
Gremio Barueri 3 America-RN 0 -1.8
+0.0
Brasiliense 2 Vila Nova 1 +0.1
Ceara 1 Gama 0 +0.0
Week of 11/28100.0*Serie C100.0*Average seed
Fortaleza 3 Brasiliense 0 No
+0.8
Marilia 2 Ceara 1 +12.9
-0.2
America-RN 2 Corinthians 0 +6.8
-0.5
Ponte Preta 3 Criciuma 1 -3.7
+0.1
CRB 1 ABC 3 -0.2
Points
Chance Will Win Championship