Question

Which element occupied highest percentage in human body?

Answer 1

Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.

Answer 2

Oxygen with 61 or 62 per cent ( apologies for my lack of precision but its along those lines.)