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*Segunda Division B100.0*Average seed
Numancia 1 Reus 0 -2.8
+0.4
Tenerife 2 Oviedo 1 +1.1
-0.2
Extremadura 0 Lugo 0 +0.1
+0.0
Malaga 3 Zaragoza 1 +0.0
Week of 5/31100.0*Segunda Division B100.0*Average seed
Oviedo 4 Rayo 3 No
+0.0
Zaragoza 0 Numancia 0 No
-0.1
Lugo 0 Tenerife 1 -0.3
-0.1
Cadiz 0 Extremadura 1 -0.3
Alcorcon 0 Gimnastic 1 +0.1
Las Palmas 0 Almeria 0 +0.0
Week of 6/8100.0*Segunda Division B100.0*Average seed
Numancia 1 Las Palmas 1 -0.2
Tenerife 1 Zaragoza 0 -0.1
Points
Chance Will Win Championship