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
Gremio Barueri 1 Fortaleza 0 +20.9
-0.8
Sao Caetano 1 America-RN 2 +7.8
-0.2
Criciuma 2 Gama 0 +3.8
-0.1
Parana 1 Ponte Preta 0 +0.6
-0.1
ABC 1 Marilia 1 -0.3
+0.1
Brasiliense 2 Juventude 2 -0.3
+0.0
Bahia 2 CRB 0 +0.1
Week of 11/21100.0*Serie C100.0*Average seed
Bragantino 0 Fortaleza 1 -26.6
+0.9
Bahia 2 Marilia 1 -5.9
+0.2
Criciuma 4 Santo Andre 4 -5.1
+0.1
Gremio Barueri 3 America-RN 0 -2.5
+0.1
Brasiliense 2 Vila Nova 1 +0.4
-0.1
Ceara 1 Gama 0 +0.0
Week of 11/28100.0*Serie C100.0*Average seed
Fortaleza 3 Brasiliense 0 No
+1.1
Marilia 2 Ceara 1 +17.2
-0.3
Ponte Preta 3 Criciuma 1 -10.7
+0.2
America-RN 2 Corinthians 0 +4.6
-0.3
CRB 1 ABC 3 -0.1
Points
Chance Will Win Championship