Among the crimes located in the community area with the highest population, what is the percentage of domestic violence?
the highest population refers to max(population); domestic violence refers to domestic = 'TRUE'; percentage = divide(count(domestic = 'TRUE'), count(domestic)) where population = max(population) * 100%
SELECT CAST(COUNT(CASE WHEN T2.domestic = 'TRUE' THEN T2.domestic END) AS REAL) * 100 / COUNT(T2.domestic) FROM Community_Area AS T1 INNER JOIN Crime AS T2 ON T2.community_area_no = T1.community_area_no GROUP BY T1.community_area_no HAVING COUNT(T1.population) ORDER BY COUNT(T1.population) DESC LIMIT 1