Question

A survey was given to people who own a certain type of car. What percent of the people surveyed were completely satisfied with the​ car?

Answer 1

well, the amount of completely satisfied customers is 1820.

now, all folks surveyed were 600 + 180 + 1820 = 2600.

if we take 2600 as the 100%, what is 1820 off of it in percentage?

`\begin{array}{ccll} amount&\%\\ \cline{1-2} 2600 & 100\\ 1820& x \end{array} \implies \cfrac{2600}{1820}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{ 10 }{ 7 } ~~=~~ \cfrac{ 100 }{ x }\implies 10x=700\implies x=\cfrac{700}{10}\implies x=70`