How are these numbers calculated?

Big Games

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

Week of 5/24100.0*Average seed
Almeria 0 Alcorcon 0 +0.1
Gimnastic 3 Elche 3 +0.1
Malaga 3 Zaragoza 1 +0.0
Week of 5/31100.0*Average seed
Reus 0 Sporting 1 +0.5
Oviedo 4 Rayo 3 -0.1
Las Palmas 0 Almeria 0 +0.1
Elche 0 Deportivo 0 +0.0
Week of 6/8100.0*Average seed
Sporting 1 Cadiz 0 +0.4
Almeria 3 Albacete 0 -0.3
Malaga 3 Elche 0 +0.0
Points
Chance Will Win Championship