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=((15)(100))/(40)`

and it yields

`x=(1500)/(40)`

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