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 +10.8
+0.2
Norwich 0 Reading 2 +3.9
+0.7
Sheff United 1 Swansea City 0 -0.6
-0.2
Cardiff 0 Ipswich 3 +0.3
Southampton 2 Burnley 2 +0.1
Week of 5/3100.0*Promoted100.0*Average seed
Reading 1 Birmingham 2 -25.8
-0.9
Crystal Palace 0 Sheff United 0 +15.8
+0.2
Points
Chance Will Win Championship