How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Monday100.0*Relegation100.0*Average seed
Botafogo 5 Volta Redonda 0 -28.4
+0.3
Saturday100.0*Relegation100.0*Average seed
Boavista 0 Fluminense 0 +5.4
-0.1
Portuguesa 1 Volta Redonda 1 +5.3
-0.1
SundayNone
Points
Chance Will Win Championship