YOU SAID:

I have 18,000 people but 24,000 of them died

INTO JAPANESE

私には18,000人の人々がいますが、そのうちの24,000人が死亡しました

BACK INTO ENGLISH

I have 18,000 people, of which 24,000 died

INTO JAPANESE

私には18,000人の人々がいます、そのうちの24,000人が亡くなりました

BACK INTO ENGLISH

I have 18,000 people, of which 24,000 died