I was working on some practice math questions for the PSAT, but after trying it for many minutes I gave up, and looked up the answer and still dont get it. Here it is:

18. The ratio of

(A) 3 to 8

(B) 5 to 3

(C) 5 to 8

(D) 5 to 24

(E) 15 to 8

Can somebody explain how they got (E) as the answer? There must be something I'm not doing right.

18. The ratio of

*x*to*t*is 5 to 8. If*t*= 3k, what is the ratio of*x*to*k*?(A) 3 to 8

(B) 5 to 3

(C) 5 to 8

(D) 5 to 24

(E) 15 to 8

Can somebody explain how they got (E) as the answer? There must be something I'm not doing right.

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