How are these numbers calculated?

Big Games

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

Week of 3/10100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
Wales 22 Ireland 9 +15.6
No
+0.4
Week of 3/11100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
Italy 18 France 40 -7.9
-0.1
England 61 Scotland 21 +0.3
+0.0
Week of 3/18100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
France 10 Wales 18 In
+1.8
Scotland 29 Italy 0 -3.8
-0.0
Ireland 13 England 9 -2.2
-0.3
Games Above .500
Chance Will Make Playoffs