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 -10.3
+0.1
-0.1
Week of 3/11100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
Italy 18 France 40 +15.0
No
+0.6
England 61 Scotland 21 +6.9
+0.1
Week of 3/18100.0*Chance in playoffs100.0*Wooden Spoon100.0*Average seed
France 10 Wales 18 -23.3
-1.0
Scotland 29 Italy 0 -20.8
-0.3
Ireland 13 England 9 -2.9
-0.3
Games Above .500
Chance Will Make Playoffs