The fraction \( \frac{21}{4} \) is an improper fraction. To simplify it:

1. **Divide** 21 by 4: 
   \[
   21 \div 4 = 5 \text{ with a remainder of } 1
   \]
   
2. **Result**:
   - Quotient: 5
   - Remainder: 1
   
So, \( \frac{21}{4} = 5 \frac{1}{4} \) as a mixed number.

Would you like more details on how to convert improper fractions or any further explanations?

Here are 5 related questions you might find interesting:
1. How do you convert any improper fraction to a mixed number?
2. How do you add and subtract mixed numbers?
3. How do you multiply improper fractions?
4. How do you convert mixed numbers back into improper fractions?
5. What are the steps to simplify complex fractions?

**Tip**: When dividing the numerator by the denominator in an improper fraction, the remainder becomes the new numerator in the mixed number.

Learn how to convert the improper fraction 21/4 into a mixed number with a simple step-by-step explanation. This problem focuses on fraction concepts, including division and the conversion of improper fractions to mixed numbers. Suitable for students in Grades 5-7.

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