This is the answer that I came out with. Hope it helps.
<span>Indefinite pronouns may replace nouns used as subjects, predicate nouns, direct objects, indirect objects, objects of a preposition, and appositives.</span>
2/4 is one you could put because 2/4 = 1/2 = 6/12, and 6/12 is less than 7/12.
Glad I could help, and good luck!
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