Which of the following compounds could it be? Please help me out?

Question

A compound is found to have a percentage composition of 80.4% bismuth, 18.5% oxygen, and 1.16% hydrogen. Which of the following compounds could it be?

A. Bi(OH)5

B. Bi(OH)3

C. H3BiO4

Answer 1

More info than needed. Just determine the fraction of one of the elements in each compound.

At Wt Bi/Molecular Wt of compound=?

b) 80.38%