Question

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. What is the cost of the most expensive book I can buy with my money and the coupon

Answer 1

$42

Explanation:

First calculate how much 20% of $35 is:

$35 * .2 = 7

Now that we have what 20% of $35 is, we can calculate how expensive of a book we can buy including the coupon:

$35 + 7 = $42