How are these numbers calculated?

Big Games

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

Thursday100.0*Average seed
Guarani 2 Botafogo 0 +0.1
Sunday100.0*Average seed
Gama 4 Coritiba 0 +0.3
Botafogo 0 Sao Paulo 1 +0.2
Points
Chance Will Make Playoffs