How are these numbers calculated?

Big Games

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

Week of 4/28100.0*Average seed
St Johnstone 1 Partick Thistle 1 -0.1
Motherwell 2 Dundee 1 -0.1
Week of 5/5100.0*Average seed
Motherwell 1 St Johnstone 5 +0.4
Hamilton 1 St Johnstone 2 +0.4
Partick Thistle 0 Motherwell 1 -0.2
Hearts 2 Hibernian 1 -0.2
Hearts 1 Celtic 3 +0.0
Week of 5/12100.0*Average seed
Motherwell 3 Hamilton 0 -0.3
St Johnstone 1 Ross County 1 -0.1

What If

Chances based on how well St Johnstone finishes out the regular season.   Explain

100100100100100100100100100100100100
If finish:ChanceChance will finish season at seed
TPW-D-Lwins title123456789101112RelegatedCount
460-0-0No100No113,215,949,696
Total:No100No113,215,949,696
Points
Chance Will Win Championship