How are these numbers calculated?

Big Games

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

Week of 5/7100.0*Chance wins title100.0*Average seed
Barcelona 4 Villarreal 1 +18.5
+0.2
Granada 0 Real Madrid 4 -17.5
-0.2
Week of 5/14100.0*Chance wins title100.0*Average seed
Las Palmas 1 Barcelona 4 +22.0
+0.2
Real Madrid 4 Sevilla 1 -20.1
-0.2
Week of 5/17100.0*Chance wins title100.0*Average seed
Celta de Vigo 1 Real Madrid 4 -24.5
-0.2
Barcelona 4 Eibar 2 +23.5
+0.2
Málaga 0 Real Madrid 2 No
-0.1
Points
Chance Will Win Championship