Least Common Denominator Worksheet
Practice finding the least common denominator (LCD) for fractions and using it to compare and order them.
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Least Common Denominator
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Read each question carefully and follow the instructions to find the least common denominator (LCD) or compare fractions.
1. The Least Common Denominator (LCD) of 1/2 and 1/4 is .
2. The LCD of 1/3 and 1/5 is .
3. The LCD of 2/3 and 1/6 is .
4. The LCD of 3/4 and 2/8 is .
Use the LCD to compare the following fractions. Write <, >, or = in the box.
5. 1/2
1/3
6. 3/4
5/8
7. Order the following fractions from least to greatest using the LCD:
1/2, 2/3, 1/4
8. Order the following fractions from greatest to least using the LCD:
3/5, 7/10, 1/2
9. Which of the following is the least common denominator for 1/6 and 1/9?
6
9
18
36
10. Which pair of fractions has an LCD of 12?
1/3, 1/4
1/2, 1/6
1/3, 1/6
1/4, 1/8
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