Could you add the answer choices? It would be much easier to help you xD Thanks!!
Answer:
The other 2/3 would be 20
Step-by-step explanation:
Each 1/3 is 10 so 10*2 is 20
Cross multiply the fractions as in 20 times D and 13 times 60 and the problem will be 20d = 780. Here you can divide 780 by 20 and the answer is what D equals to.
Did this help