How are these numbers calculated?

Big Games

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

Week of 6/14100.0*Chance in next round100.0*Average seed
Argentina 1 Iceland 1 -1.0
-0.0
Croatia 2 Nigeria 0 -0.1
Week of 6/21100.0*Chance in next round100.0*Average seed
Argentina 0 Croatia 3 -18.0
-0.4
Nigeria 2 Iceland 0 +13.0
+0.2
Week of 6/28None
Points
Chance Will Make Next Round