How are these numbers calculated?

Big Games

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

Week of 4/4100.0*Chance in playoffs100.0*Average seed
Sao Paulo 1 Chivas Guadalajara 2 -17.4
-0.6
Week of 4/11100.0*Chance in playoffs100.0*Average seed
Cienciano 0 Sao Paulo 2 +26.7
+0.5
Caracas 0 Chivas Guadalajara 0 +8.4
+0.1
Week of 4/19100.0*Chance in playoffs100.0*Average seed
Sao Paulo 2 Caracas 0 +0.4
Chivas Guadalajara 0 Cienciano 0 +0.1
Points
Chance Will Make Playoffs