How to calculate percentage of nitrogen in 49.999 mg /g of uric acid in a sample?

Uric acid is ; C5H4N4O3



The formula mass is (5 x 12) + 4 + (4 x 14) + (3 x 16)



The %age of nityrogen is ((4 x 14)/formula mass)) x 100



Multiply this %age by 49.999 - that's the answer.How to calculate percentage of nitrogen in 49.999 mg /g of uric acid in a sample?
Get both to grams or mgrams , divide and multiply by 100.



=4.9999%