How are these numbers calculated?

Big Games

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

Week of 4/14100.0*Chance in playoffs100.0*Average seed
Palmeiras 1 Sport Recife 1 -7.6
-0.1
Week of 4/21100.0*Chance in playoffs100.0*Average seed
Palmeiras 2 LDU 0 +8.5
+0.3
Sport Recife 2 Colo-Colo 1 -2.6
-0.1
Week of 4/28100.0*Chance in playoffs100.0*Average seed
Colo-Colo 0 Palmeiras 1 In
+1.0
Points
Chance Will Make Playoffs