How are these numbers calculated?

Big Games

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

Sunday100.0*Promoted100.0*Average seed
Fluminense 0 Volta Redonda 3 +39.7
+0.4
Wednesday100.0*Promoted100.0*Average seed
Flamengo 2 Boavista 0 Yes
+0.4
ThursdayNone
Points
Chance Will Be Promoted