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
Vasco da Gama 1 Volta Redonda 1 -0.8
+4.7
+0.1
Botafogo 2 Flamengo 2 +0.4
+1.7
+0.1
Madureira 1 Fluminense 3 -0.2
-1.4
-0.0
Bangu 2 Boavista 1 +7.6
+0.2
Week of 4/9100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Vasco da Gama 1 Madureira 0 No
+0.0
Volta Redonda 0 Fluminense 2 -10.0
-0.2
Flamengo 3 Boavista 0 -9.4
-0.1
Botafogo 1 Bangu 0 -4.9
-0.1
Week of 4/17100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Bangu 0 Flamengo 3 No
-0.2
Madureira 1 Volta Redonda 1 No
-0.2
Boavista 0 Botafogo 1 +0.1
Points
Chance Will Win Championship