The problem states that triangles LMN and ABC are similar. Similarity in triangles refers to the relationship between two triangles in which their corresponding angles are equal and corresponding sides are proportional.
However, to find the exact value of 'y', we need more data regarding the lengths of the sides of the two triangles. We need to know the lengths of at least two corresponding sides in triangles LMN and ABC.
Currently, we don't possess this information and it is therefore impossible to solve the problem with the details given. We will need more information to find the value of 'y'.
In such mathematical situations, it's important to ensure that all necessary data points are readily available to reach a valid and accurate solution. Without sufficient data, achieving a correct result is not possible.