How are these numbers calculated?

Big Games

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

Week of 5/6100.0*Average seed
Hearts 1 Aberdeen 2 -0.2
Partick Thistle 1 Rangers 2 +0.1
Celtic 4 St. Johnstone 1 +0.1
Week of 5/13100.0*Average seed
Rangers 2 Hearts 1 -0.2
Partick Thistle 0 Celtic 5 +0.1
St. Johnstone 1 Hearts 0 -0.1
Week of 5/20None
Points
Chance Will Win Championship