To express \( \frac{15}{4} \) in the form of a mixed number, we can divide 15 by 4.
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Divide 15 by 4, which equals 3 with a remainder of 3.
- This means \( 15 = 4 \times 3 + 3 \).
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Therefore, we can write \( \frac{15}{4} \) as a mixed number: \[ 3 \frac{3}{4} \]
So, in the format you requested, \( 15/4 = 3 ; 3/4 \).