Is it a multiple choice question? I mean, 10/80?..
No. 2.5:3.5 would be either proportional to 12:16.8 or 3.571428( which is 25/7);5
Answer:
$23.85
Step-by-step explanation:
39.95 x 3 which can also be 39.95 + 39.95 + 39.95=119.85
So then do 143.70-119.85 to find the answer which is 23.85.
The answer you are going to be looking for with this question is 16.4. Hope this helps you out a little :)