Question

Enrique is saving money to buy a graphing calculator. So far he has saved $30. His math teacher told him he has saved 40% of what he will need. How much does the calculator cost? I know the answer, I just need the steps. Thanks! :)

Answer 1

The calculator cost $75

Explanation:

Let

x ----> the calculator cost

Remember that

`40\%=40\100=0.40`

we know that

The cost of the calculator multiplied by the percentage saved must be equal to the amount saved by Enrique

so

`0.40x=30`

solve for x

Divide by 0.40 both sides

`x=\$75`