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
Croatia 2 Nigeria 0 +25.5
+0.7
Argentina 1 Iceland 1 +0.9
Week of 6/21100.0*Chance in next round100.0*Average seed
Argentina 0 Croatia 3 In
+0.3
Iceland 1 Croatia 2 +0.0
Week of 6/28None
Points
Chance Will Make Next Round