How are these numbers calculated?

Big Games

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

Week of 6/16100.0*Chance in next round100.0*Average seed
Argentina 1 Iceland 1 -1.0
-0.0
Week of 6/21100.0*Chance in next round100.0*Average seed
Nigeria 1 Argentina 2 +81.1
+1.3
Argentina 0 Croatia 3 -18.0
-0.4
Iceland 1 Croatia 2 +0.4
+0.1
Week of 6/28None
Points
Chance Will Make Next Round