Answer:
15:9
Step-by-step explanation:
Because you have a total of 15 shirts and a total of 9 skirts.
5:7
You have to set up a ratio. You have the number of shirts (15) to skirts AND pants (so 12+9=21). This gives you both sides of your ratio 15:21. You can simplify by dividing both sides by 3 (greatest common factor) and get 5:7
Answer: subject?