You would do 45 divided by 9 which is 5. Then you do 5x7= 35 and that's your answer
The most she can pay for the jacket is $375 (=600/(100%+60%)) assuming this is the cost of the jacket before it sewn with metallic threads and beads. A markup is a difference between the production cost and the selling price in order to cover the additional cost related to the product. Based on the data, she wants to keep the 60% for covering the cost.
In the attachment this is how i did it! ~Best of Luck~