How are these numbers calculated?

Big Games

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

Week of 4/21100.0*Chance in playoffs100.0*Average seed
Seongnam FC 2 Buriram 1 In
+0.5
Guangzhou R&F 0 Gamba Osaka 5 -1.4
Week of 5/5100.0*Chance in playoffs100.0*Average seed
Gamba Osaka 2 Seongnam FC 1 -0.5
Buriram 5 Guangzhou R&F 0 -0.1
Points
Chance Will Make Playoffs