CPM Homework Help : ACC7 Problem 7-102

The local sports shop has backpacks on sale for $\$28$ . The original price was $\$40$ . What is the percent decrease for the backpack price?

Hint:

What is the decrease as a percent of the original price?

More Help:

Decrease: $\$40-\$28=\$12$
$\$12=(x)(\$40)$

Answer:

$30\%$