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*Chance wins title100.0*Semi-Final100.0*Average seed
Vasco da Gama 1 Bonsucesso 1 No
-0.4
-0.3
Nova Iguacu 3 Audax Rio 3 +0.8
Botafogo 0 Flamengo 2 +0.1
Friburguense 1 Cabofriense 1 +0.1
+0.2
Duque de Caxias 2 Fluminense 2 +0.2
Week of 3/15100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Boavista 2 Botafogo 1 -0.2
Fluminense 1 Vasco da Gama 1 Yes
-0.2
Audax Rio 2 Cabofriense 0 +0.1
+0.2
Week of 3/22100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Fluminense 3 Volta Redonda 1 -0.3
Vasco da Gama 4 Duque de Caxias 0 +0.2
Flamengo 5 Cabofriense 3 +0.1
Points
Chance Will Win Championship