In the diagram, the rectangle has a width w, a length of 8, and a perimeter of 24 . What is the ratio of its width to its length? Write your answer in the form x:y, where x and y are relatively prime positive integers.
The two long sides total 16. The two short sides total (24 – 16) equals 8 so each one of them is 4.
The ratio of width to length is 4:8 = 1:2. I'm not sure what relatively prime means, but 1 is not a prime number.