How are these numbers calculated?

Big Games

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

Week of 3/21100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Barra Mansa 1 Botafogo 1 -13.7
-3.4
-0.5
Cabofriense 0 Botafogo 1 +6.0
+4.0
+0.3
Flamengo 2 Bangu 1 -4.2
-0.3
-0.1
Madureira 1 Bonsucesso 1 +3.8
+0.5
+0.1
Flamengo 2 Vasco da Gama 1 +2.8
-1.2
-0.1
Boavista 1 Vasco da Gama 2 -1.4
-0.1
-0.1
Volta Redonda 0 Madureira 3 -1.4
-0.9
-0.1
Fluminense 1 Tigres do Brasil 1 +0.5
+2.2
+0.1
Fluminense 3 Cabofriense 0 -0.1
-1.5
-0.0
Macae 1 Bangu 1 +0.1
+1.2
+0.0
Resende 2 Macae 2 +0.7
Volta Redonda 1 Tigres do Brasil 1 +0.1
Week of 3/28100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Vasco da Gama 1 Botafogo 1 -4.8
+0.6
-0.1
Bonsucesso 0 Flamengo 2 -3.6
-0.3
-0.1
Madureira 1 Macae 0 -0.9
-0.9
-0.1
Fluminense 4 Barra Mansa 2 -0.1
-2.6
-0.0
Week of 4/4100.0*Chance wins title100.0*Semi-Final100.0*Average seed
Nova Iguacu 0 Flamengo 0 +25.8
+0.3
Botafogo 4 Madureira 1 +18.9
Yes
+1.0
Botafogo 1 Macae 0 +9.3
+0.2
Flamengo 3 Fluminense 0 -7.9
+6.0
-0.0
Friburguense 5 Vasco da Gama 4 +2.9
+2.6
+0.4
Vasco da Gama 4 Volta Redonda 1 -0.0
Madureira 1 Fluminense 2 +0.0
Points
Chance Will Win Championship