How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Madureira 1 Fluminense 3 No
-13.6
-0.8
Botafogo 2 Flamengo 2 +0.3
+2.1
+0.1
Bangu 2 Boavista 1 +0.2
+2.7
-0.0
Vasco da Gama 1 Volta Redonda 1 -0.1
-0.0
Week of 4/9100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Vasco da Gama 1 Madureira 0 No
-0.7
Flamengo 3 Boavista 0 -0.1
+0.0
Botafogo 1 Bangu 0 +0.3
Week of 4/17100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Bangu 0 Flamengo 3 +0.3
Boavista 0 Botafogo 1 +0.2
Madureira 1 Volta Redonda 1 -0.1
Points
Chance Will Win Championship