Answer:
5/14
Step-by-step explanation:
Fiction and reference books constitute a whole, this means that the total of books (and therefore de denominator) is the sum of them 9 + 5 = 14
And then 9 and 5 become the numerators for each fraction.
Considering this the fictional book are 9/14 of the whole and the reference books are 5/14 of the whole.
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