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Americans’ salt consumption is increasing. The recommended daily intake of salt is 2300 milligrams per person. In 2006, American men consumed an average of 4300 milligrams of salt daily. This was a 54.7 percent increase over the average daily salt intake in 1974 (Source: National Health and Nutrition Examination Survey). What was the average daily salt intake for men in 1974? Round your answer to the nearest 10 milligrams.

Answer :

namely, if the consumption in 1974 was "x" or the 100%, 4300 is 54.7% extra of that, so 4300 is really 100%+54.7%, or 154.7%, now, what is "x" then?

well    [tex]\bf \begin{array}{ccllll} amount&\%\\ \textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\ 4300&154.7\\ x&100 \end{array}\implies \cfrac{4300}{x}=\cfrac{154.7}{100}[/tex]

solve for "x"

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