hmm let's convert the mg to ounces
so.. there are 28.35 mgs in 1oz, how many oz in 50?
[tex]\bf \begin{array}{ccllll}
oz&mg\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
1&28.35\\
x&50
\end{array}\implies \cfrac{1}{x}=\cfrac{28.35}{50}\implies \cfrac{50}{28.35}=x\implies \cfrac{1000}{567}=x[/tex]
now, if 6oz is the 100%, how much is it then, 1000/576 oz in percentage?
well [tex]\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
6&100\\
\frac{1000}{567}&x
\end{array}\implies \cfrac{6}{\frac{1000}{567}}=\cfrac{100}{x}\implies \cfrac{\frac{6}{1}}{\frac{1000}{567}}=\cfrac{100}{x}
\\\\\\
\cfrac{6\cdot 567}{1000}=\cfrac{100}{x}\implies x=\cfrac{100000}{3402}\implies x\approx 29.39\%[/tex]
