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No.
7/12 - 2/12 = ?
7/12 - 2/12 = ?
The fraction of students with brown hair is 7/12.
The fraction of students with red hair is 2/12.
To subtract fractions, the denominators must be the same. In this case, the denominators are already the same (both 12). To subtract the fractions, subtract the numerators: 7 - 2 = 5.
So, the fraction more of the students with brown hair than red hair is 5/12.
Therefore, your answer of 7/12 is incorrect. The correct answer is 5/12.