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
Botafogo 2 Flamengo 2 -0.7
-2.3
-0.1
Madureira 1 Fluminense 3 -0.3
-0.6
-0.0
Vasco da Gama 1 Volta Redonda 1 -2.8
-0.0
Bangu 2 Boavista 1 +5.4
+0.1
Week of 4/9100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Vasco da Gama 1 Madureira 0 No
+0.1
Flamengo 3 Boavista 0 +26.3
+0.8
Volta Redonda 0 Fluminense 2 +4.0
+0.0
Botafogo 1 Bangu 0 -2.3
-0.2
Week of 4/17100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Bangu 0 Flamengo 3 Yes
+0.3
Madureira 1 Volta Redonda 1 +16.9
+0.2
Boavista 0 Botafogo 1 +0.8
-0.2
Points
Chance Will Win Championship