Question

Ann had $500 at the beginning of the year. If she had $360 left, what percent of her money did she spend?

Answer 1

well, she spent $140, because 500 - 360 = 140.

now, if we take 500 to be the 100%, what is 140 off of it in percentage?

`\begin{array}{ccll} amount&\%\\ \cline{1-2} 500 & 100\\ 140& x \end{array} \implies \cfrac{500}{140}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{25}{7}=\cfrac{100}{x}\implies 25x=700\implies x=\cfrac{700}{25}\implies x=28`

Answer 2

She spent 28% of her money.
Explanation: 500 x .28 = $360