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 +16.2
No
+0.6
Week of 3/11100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
Italy 18 France 40 -8.4
-0.1
England 61 Scotland 21 +7.4
+0.1
Week of 3/18100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
France 10 Wales 18 In
+1.0
Scotland 29 Italy 0 -20.5
-0.3
Ireland 13 England 9 -0.7
-0.3
Games Above .500
Chance Will Make Playoffs