Answer:
27 and 45
Explanation:
3:5 turns into 3+5 which equals 8. After that all you do is divide 72 by 8 and you get 9. Since we have 3 and 5 as the ratio you have to do 3*9 and 5*9. Thats how we get 27 and 45.
Hope I helped!!! :D Ask me any questions if you don't understand!
Oh, and a ratio is basically a fraction. So 3:5 is acually 3/5 too!