Hi Madina! The way this sentence is worded sounds awkward and confusing. Try one of these instead: "Of the many people who died, half were children." "Many people died. Among them, half were children." "Half of those who died were children." I hope these are helpful. Please let me know if you have any further questions =)

Many people died and half of them were children. Если люди погибли в результате стихийного бедствия, а не болезни то лучше сказать "Many people were killed and half of them were children.

Half of the people who died were children. That is the most simply way to say it.