Question

The consumption of a vegetable has decreased. The consumption per capita in 2000 was 22.8 ​pounds, and in​ 2010, the consumption dropped to 12.1 pounds. Find the percent decrease. Round to the nearest tenth of a percent.

Answer 1

So... if we take 22.8 to be the 100%, then it dropped to 12.1,
the difference in between being 22.8 - 12.1 or 10.7 decrease

so... what is 10.7 in percentage, of 22.8?
well
$\bf \begin{array}{ccllll} amount&\%\\ \textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\ 22.8&100\\ 10.7&x \end{array}\implies \cfrac{22.8}{10.7}=\cfrac{100}{x}$

solve for "x"