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
Jiquiá FAC 39 Serafiano 10 +0.2
Zopene 20 Doza 27 (ot)-0.1
Olímpia 40 Duas 37 -0.1
Siliar 44 Floresta Negra 20 -0.1
Paternos 25 Poti 15 -0.0
FAC Metropolitano 23 Esquina de Baixo 20 (ot)-0.0
Week of 5/17100.0*Average seed
Liga Operária 43 Siliar 37 +0.3
União Militar 28 Jiquiá FAC 39 +0.2
AE Popular 10 Paternos 22 -0.0
Week of 5/24100.0*Average seed
Siliar 26 Jiquiá FAC 35 +0.5
AE Popular 40 Olímpia 37 +0.3
Zopene 37 Serafiano 15 -0.1
Points
Chance Will Win Championship