How are these numbers calculated?

Big Games

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

Week of 4/22None
Week of 4/26100.0*League One100.0*Average seed
Wigan 0 Blackpool 2 -31.4
+1.3
Doncaster 1 Reading 3 -6.7
+0.2
Birmingham 1 Leeds 3 -3.7
+0.2
QPR 1 Millwall 1 +3.2
-0.1
Charlton 1 Blackburn 3 -1.1
+0.1
Middlesbrough 3 Barnsley 1 -0.4
+0.0
Birmingham 0 Wigan 1 -0.3
+0.2
Charlton 3 Watford 1 -0.1
Week of 5/3100.0*League One100.0*Average seed
Blackpool 0 Charlton 3 +0.8
-0.9
Millwall 1 Bournemouth 0 +0.5
-0.3
Bolton 2 Birmingham 2 No
+0.1
Leicester 1 Doncaster 0 No
+0.0
Points
Chance Will Win Championship