How are these numbers calculated?

Big Games

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

Week of 5/10100.0*Average seed
Bolanha 24 Olimorque 17 +0.1
FAC Metropolitano 23 Esquina de Baixo 20 (ot)+0.1
Siliar 44 Floresta Negra 20 +0.1
Zopene 20 Doza 27 (ot)-0.0
Jiquiá FAC 39 Serafiano 10 -0.0
Week of 5/17100.0*Average seed
Serafiano 30 FAC Metropolitano 27 (ot)-0.2
Liga Operária 43 Siliar 37 +0.2
Floresta Negra 36 Abedi Pelé 15 -0.2
Doza 40 Olimorque 21 +0.1
União Militar 28 Jiquiá FAC 39 -0.0
Week of 5/24100.0*Average seed
FAC Metropolitano 27 União Militar 13 +0.3
Floresta Negra 12 Paternos 47 +0.3
Esquina de Baixo 17 Olimorque 19 -0.1
Points
Chance Will Win Championship