How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Promoted100.0*Average seed
Annan Athletic 0 Stirling Albion 1 No
-0.5
Elgin City 1 Berwick 2 No
Clyde 1 Montrose 0 -0.2
Week of 4/27100.0*Promoted100.0*Average seed
Berwick 0 Annan Athletic 2 +0.5
Peterhead 3 Clyde 0 +0.1
Stirling Albion 1 Elgin City 1 -0.0
Week of 5/4100.0*Promoted100.0*Average seed
Clyde 1 Stirling Albion 2 -0.2
Annan Athletic 1 Montrose 1 +0.1
Points
Chance Will Win Championship