Common Denominators Worksheet

Common Denominators

Read each question carefully and follow the instructions to find common denominators and compare fractions.

Find the least common multiple (LCM) for each pair of numbers.

1. 4 and 6:  

2. 3 and 5:  

3. 8 and 12:  

4. 7 and 2:  

For each pair of fractions, identify a common denominator. You do not need to find the least common denominator.

1. 1/3 and 1/4

2. 2/5 and 3/10

3. 3/8 and 1/2

Choose the least common denominator (LCD) for each pair of fractions.

1. What is the LCD for 1/2 and 3/4?

2. What is the LCD for 2/3 and 5/6?

Determine if the following statements are true or false.

1. The common denominator for 1/2 and 1/3 is 5.

2. To compare fractions, you must first find a common denominator.

Rewrite each pair of fractions with their least common denominator.

1. 1/2 and 2/3

2. 3/4 and 1/6

3. 5/8 and 1/4

Use the fraction bars to compare the following fractions. Write <, >, or = in the blank.

1/2   1/3

2/4   1/3

Order the following fractions from least to greatest.

1. 1/2, 1/4, 3/8

2. 2/3, 5/6, 1/2