Answer: 
Step-by-step explanation:
Given : Marty has saved $72. He spent $8 on a video rental.
i.e. The amount of money he saved = $72
The amount of money he spent on video rental = $8
Now, the amount of money he had left = 
Thus , the ratio that represent what portion of his savings he has left :-

Hence, the ratio that represent what portion of his savings he has left :-
