Question

Example #2: A jewelry store raised itsprice on a pair of earrings from $120to $200. What was the percent ofchange? PLSS HELP

Answer 1

The percent of change is calculated as follows:

$\frac{new\text{ price - old price}}{old\text{ price}}\cdot100$

Substituting with old price = 120, and new price = 200, we get:

$\begin{gathered} \text{ percent of change=}\frac{200-120}{120}\cdot100 \\ \text{ percent of change=}\frac{2}{3}\cdot100 \\ \text{ percent of change = 66.7\%} \end{gathered}$