Question

A party size bag of tortilla chips normally costs 3.80. The supermarket has them on sale today for 2.85.what is the percentage of the discount?

Answer 1

The percentage of the discount is 75%

Answer 2

So from 3.80 to 2.85, is a difference of 0.95 or 95 cents.

now, if we take 3.80 to be the 100%, what is 0.95 off of it in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 3.80&100\\ 0.95&p \end{array}\implies \cfrac{3.80}{0.95}=\cfrac{100}{p}\implies p=\cfrac{0.95\cdot 100}{3.80}$