How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Average seed
Cheltenham 1 Aldershot 2 -0.5
Lincoln City 1 Bury 0 -0.2
Barnet 0 Rotherham 1 +0.2
Accrington 1 Barnet 0 +0.1
Torquay 1 Macclesfield 0 -0.1
Crewe 5 Accrington 1 -0.0
Week of 5/8100.0*Average seed
Cheltenham 1 Accrington 1 -0.2
Lincoln City 0 Macclesfield 0 +0.2
Barnet 1 Rochdale 0 -0.2
Points
Chance Will Win Championship