How are these numbers calculated?

Big Games

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

Week of 6/20100.0*Chance in playoffs100.0*Round of 8100.0*Average seed
Bolivia 1 Peru 3 -29.5
-29.5
-2.0
Ecuador 1 Chile 2 +2.2
+2.2
+0.1
Colombia 1 Qatar 0 +2.0
+2.0
Argentina 1 Paraguay 1 +1.9
+1.9
Brazil 0 Venezuela 0 +1.5
+1.5
+0.1
Uruguay 2 Japan 2 -0.3
-0.3
+0.0
Week of 6/24100.0*Chance in playoffs100.0*Round of 8100.0*Average seed
Bolivia 1 Venezuela 3 Out
No
-1.7
Colombia 1 Paraguay 0 +9.4
+9.4
+0.2
Ecuador 1 Japan 1 +9.4
+9.4
+0.1
Qatar 0 Argentina 2 -3.1
-3.1
-0.1
Points
Chance Will Make Playoffs