How are these numbers calculated?

Big Games

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

Sunday, 2/6100.0*Average seed
Fluminense 2 Botafogo 3 -0.4
Saturday, 2/12None
Sunday, 2/13100.0*Average seed
Madureira 0 Fluminense 1 +0.3
Botafogo 1 Macae 1 +0.1
Points
Chance Will Make Playoffs