Answer:
7:3
Explanation:
If the store sold 60 apples total and 18 of them are red to find the ratio subtract 18 from 60. You will then get 42:18 as the ratio. That can be simplified by dividing 42 and 18 by 2. Then your new ratio will be 21:9. That can be simplified even more by dividing 21 and 9 by 3. Now you have your final answer 7:3. For every 7 green apples sold 3 red apples will be sold. I hope that helped. :)