Answer :

Given : ratio of hydrogen: oxygen=2:1.

Tip: Fraction to Percentage conversion is done by multiplying with 100.

In the question we get to know the fraction or ratio between hydrogen and oxygen i.e; 2:1.

Hence, we can write Hydrogen occupies two parts in water

and Oxygen occupies one part.

But since water itself is only composed of hydrogen and oxygen

therefore,

Total parts of water = Parts of hydrogen + parts of oxygen.

= 2+1

=3 parts.

Therefore,

Fraction of water occupied by hydrogen

Fraction of water occupied by oxygen

Percentage of water occupied by hydrogen

=66.66%

percentage of water occupied by oxygen

=33.33%

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