It seems there might be a misunderstanding in the question. If DJ has 16 movies in total, stating that 38 of them are comedies doesn't work, as the number of comedies cannot exceed the total number of movies he has.
If you meant to ask how many movies he has if he has 16 total movies and a certain number of them are comedies, could you please clarify that part? Or if you meant to ask how many additional movies are needed to have a certain number of comedies, please let me know!