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.

Set up a ratio.

3/1.50 = 90/x

Cross multiply and solve for x.

45?

Right.

To find how much Gina earned, we need to determine the number of boxes she sold first. We can do this by dividing the total sales ($90) by the price per box ($3). Let's go step by step:

Step 1: Find the number of boxes sold:
Number of boxes = Total sales / Price per box
Number of boxes = $90 / $3
Number of boxes = 30

Step 2: Calculate the earnings:
Since Gina earns $1.50 for each box sold, we can find her total earnings by multiplying the number of boxes sold by her earnings per box.
Total earnings = Number of boxes * Earnings per box
Total earnings = 30 * $1.50
Total earnings = $45

Therefore, Gina earned $45 from selling cookies.