To convert the fraction \( \frac{21}{4} \) into a mixed number, follow these steps:
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Divide the numerator by the denominator:
- Divide 21 by 4.
- \( 21 \div 4 = 5 \) with a remainder.
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Calculate the remainder:
- \( 4 \times 5 = 20 \)
- \( 21 - 20 = 1 \)
- The remainder is 1.
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Form the mixed number:
- The whole number part is 5.
- The remainder over the original denominator becomes the fractional part. So, this will be \( \frac{1}{4} \).
Putting it all together, \( \frac{21}{4} \) as a mixed number is \( 5 \frac{1}{4} \).