How are these numbers calculated?

Big Games

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

Week of 11/11100.0*Serie C100.0*Average seed
Goias 3 Joinville 2 +12.5
-0.4
Brasil de Pelotas 1 Oeste 1 +2.3
-0.0
Bragantino 1 Vasco da Gama 2 -1.7
+0.2
Atletico-GO 5 Tupi 3 -0.4
+0.1
Week of 11/18100.0*Serie C100.0*Average seed
Oeste 0 Joinville 2 -19.5
+0.5
Bahia 3 Bragantino 2 -1.3
+0.1
Week of 11/25100.0*Serie C100.0*Average seed
Nautico 0 Oeste 2 Yes
-0.3
Joinville 4 Vila Nova 2 -29.3
+0.3
Points
Chance Will Win Championship