How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Average seed
Gillingham 1 Swindon 1 -0.3
Huddersfield 2 Walsall 0 -0.2
Swansea City 4 Leyton Orient 1 +0.1
Tranmere 1 Southend 0 -0.1
Oldham 2 Cheltenham 1 -0.1
Week of 5/3100.0*Average seed
Leyton Orient 3 Bristol Rovers 1 -0.2
Swindon 2 Millwall 1 +0.2
Points
Chance Will Win Championship