AHSME 1969 Problem 2

If an item is sold for $x$ dollars, there is a loss of $15\%$ based on the cost. If, however, the same item is sold for $y$ dollars, there is a profit of $15\%$ based on the cost. The ratio of $y:x$ is: $\text{(A) } 23:17 \text{(B) } 17y:23 \text{(C) } 23x:17 \\ \text{(D) dependent upon the cost} \text{(E) none of these.}$