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
Birmingham 1 Preston 2 -2.9
-0.1
Sheff United 1 Swansea City 0 +1.1
+0.0
Southampton 2 Burnley 2 -0.3
-0.2
Cardiff 0 Ipswich 3 +0.3
Norwich 0 Reading 2 -0.1
Week of 5/3100.0*Promoted100.0*Average seed
Burnley 4 Bristol City 0 +6.6
+0.6
Preston 2 QPR 1 -5.6
-0.2
Sheff Wed 1 Cardiff 0 +0.2
Points
Chance Will Win Championship