Worksheet: Common Denominators

In this worksheet, we will practice finding a common denominator for each pair of fractions and using this to solve problems in real-life situations.

Q1:

Which of the following sets of fractions has an LCD of 60 and is ordered from least to greatest?

  • A 7 2 4 , 1 5 , 1 3
  • B 1 3 , 1 5 , 7 1 2
  • C 1 5 , 7 2 4 , 1 3
  • D 1 5 , 1 3 , 7 1 2
  • E 7 1 2 , 1 3 , 1 5

Q2:

Find the LCD of the following pair of fractions: 2 3 and 5 8 .

Q3:

Find the LCD of the following pair of fractions: 2 3 and 2 9 .

Q4:

Find the LCD of the following pair of fractions: 4 9 and 5 1 1 .

Q5:

Find the LCD of the following pair of fractions: 1 2 and 1 3 .

Q6:

Find the LCD of the following pair of fractions: 3 5 and 6 1 1 .

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