To determine which fraction is greater between 21 and 43, you can compare them directly by converting them to a common denominator or by converting them to decimal form.
Method 1: Common Denominator
- Convert both fractions to have the same denominator.
- The least common denominator (LCD) of 2 and 4 is 4.
- Convert 21 to a fraction with a denominator of 4:
21=2×21×2=42
- 43 already has a denominator of 4.
Now compare the numerators:
42 vs. 43
Since 2 is less than 3, 42 (or 21) is less than 43.
Method 2: Decimal Form
- Convert 21 to decimal form:
21=0.5
- Convert 43 to decimal form:
43=0.75
Since 0.5 is less than 0.75, 21 is less than 43.
Conclusion
43 is greater than 21.