How are these numbers calculated?

Big Games

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

Week of 3/8100.0*Semi-Final100.0*Average seed
Nova Iguacu 3 Audax Rio 3 No
-0.6
Friburguense 1 Cabofriense 1 +1.0
+0.0
Vasco da Gama 1 Bonsucesso 1 +0.4
Bangu 1 Madureira 1 +0.1
Botafogo 0 Flamengo 2 +0.1
Resende 3 Macae 2 +0.1
Boavista 1 Volta Redonda 0 -0.1
Week of 3/15100.0*Semi-Final100.0*Average seed
Volta Redonda 3 Nova Iguacu 1 -1.2
Friburguense 1 Resende 0 -0.2
Macae 4 Duque de Caxias 1 -0.2
Boavista 2 Botafogo 1 -0.1
Flamengo 2 Bangu 2 +0.1
Madureira 1 Bonsucesso 2 +0.0
Week of 3/22100.0*Semi-Final100.0*Average seed
Audax Rio 0 Macae 1 -0.5
Friburguense 2 Bonsucesso 1 -0.5
Boavista 1 Bangu 0 +0.3
Botafogo 1 Nova Iguacu 1 -0.0
Points
Chance Will Win Championship