How are these numbers calculated?

Big Games

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

Week of 6/8100.0*Chance in playoffs100.0*Average seed
Italy 1 Croatia 1 +14.5
+0.2
Spain 4 Ireland 0 -12.8
-0.1
Spain 1 Italy 1 -1.9
-0.0
Denmark 2 Portugal 3 -1.6
Ireland 1 Croatia 3 -1.0
Greece 1 Czech Rep 2 -0.4
Week of 6/15100.0*Chance in playoffs100.0*Average seed
Italy 2 Ireland 0 +28.4
+0.3
Greece 1 Russia 0 -6.3
-0.1
Croatia 0 Spain 1 +4.9
-0.1
Ukraine 0 France 2 -1.2
Denmark 1 Germany 2 -1.0
Czech Rep 1 Poland 0 -0.3
Portugal 2 Netherlands 1 +0.2
+0.0
Points
Chance Will Make Playoffs