Question

A store is selling scooter for $40. You have coupon and purchase it for $15. What percentage was the coupon?

Answer 1

We can solve this problem by applying the rule of three:

$\begin{gathered} 40\text{ dollars ------100\%} \\ 15\text{ dollars ------ x} \end{gathered}$

hence,

$x=\frac{(15)(100)}{40}$

and it yields

$x=\frac{1500}{40}$

which result in x= 37.5. It means that 15 dollars corresponds to 37.5%