How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Promoted100.0*Average seed
Sheff United 1 Swansea City 0 No
-0.2
Cardiff 0 Ipswich 3 +0.7
Birmingham 1 Preston 2 -0.2
-0.3
Southampton 2 Burnley 2 +0.2
Week of 5/3100.0*Promoted100.0*Average seed
Preston 2 QPR 1 -0.1
Swansea City 0 Blackpool 1 -0.1
Points
Chance Will Win Championship