Gina sold cookies for $3 a box. For each box she sells, she earns $1.50. One week, Gina sold $90 worth of cookies. How much did she earn?

-How do I find this answer? I don't know the steps to finding it.

3 answers

Set up a ratio.

3/1.50 = 90/x

Cross multiply and solve for x.
45?
Right.