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