I encountered a question which is phrased:
A book store stocks 1/5 of its books as fiction works, and 1/3 less than the fiction books as self-help books. What fraction of books are fiction and self-help books?
I have a problem with the highlighted part. The (1/3) just seems to hang there, without explicitly applying to the number of fiction books.
The solution manual interprets this as:
number of self-help books = number of fiction - (1/3 x number of fiction)
Is this question phrased correctly?