The answer to this
question would be 65%
oxygen,
18%
carbon, 10%
hydrogen, 3%
Nitrogen,
1.5%
calsium, 1%
phosphorus, 0.25%
sulphour and
1.25% other
elements. These values are the
approximate
contents of different elements in a
human being.
An example:
If the
person has a
mass of 30
kilograms, (30/100)*65=19.5 Kg
will be oxygen.