You are right. I messed up here. The voter turn out in LA is typically ~10% of the population. Garcetti got ~6% of the population to vote for him in '13.
https://en.wikipedia.org/wiki/Los_Angeles_mayoral_election,_...
https://en.wikipedia.org/wiki/Los_Angeles_mayoral_election,_...
there are about 4 million residents in LA. 1 voter per 50k residents amounts to 80 voters. i must be misunderstanding your comment...