30% of Los Angelenos live in South LA while 40% of fast food restaurants are located there.?

Question

they are complaining that there are hardly any sit-down restaurnats in this area. WHY??

Answer 1

why are they complaining?

or

why are there relatively few sit down restaurants?

***
my guess is that sit-down places haven't made money and thus entrepreneurs won't open many of them in the area.

as to why people complain -- you already know that.

Answer 2

They aren't being forced to go to the fast food places. People need to take responsibility for their own actions. If they don't want fast food, don't go there.