Respuesta :

In order to simplify 20 over 30 you need to divide each number by the SAME NUMBER.

So that is what is wrong. They divided 20 over 30 by 5 and 6. That's incorrect.
You have to divide the fraction with one number that can go into both of them. in this case 20/30 would be divided by 10, because 10 fits in both so the answer should be 2/3