How are these numbers calculated?

Big Games

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

Week of 7/7100.0*Chance in playoffs100.0*Average seed
Martinique 2 Nicaragua 0 +25.2
+2.3
United States 3 Martinique 2 -19.9
-2.3
Mexico 0 Jamaica 0 -2.7
El Salvador 2 Curacao 0 -2.0
-0.0
Panama 2 Nicaragua 1 +0.9
-0.2
French Guyana 2 Canada 4 -0.1
Honduras 0 Costa Rica 1 -0.1
United States 1 Panama 1 +0.1
Week of 7/14100.0*Chance in playoffs100.0*Average seed
Panama 3 Martinique 0 -54.6
-2.7
Jamaica 1 El Salvador 1 Out
-0.2
Nicaragua 0 United States 3 +5.0
+0.4
Curacao 0 Mexico 2 +4.8
+0.0
Canada 0 Honduras 0 -2.8
-0.1
Costa Rica 3 French Guyana 0 +0.3
-0.1
Points
Chance Will Make Playoffs