Worksheet: Common Denominators

In this worksheet, we will practice finding a common denominator of two proper fractions using models or listing multiples and using this to write both fractions over the same denominator.

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

Q2:

Find the LCD of the following pair of fractions: 23 and 58.

Q3:

Find the LCD of the following pair of fractions: 23 and 29.

Q4:

Find the LCD of the following pair of fractions: 49 and 511.

Q5:

Find the LCD of the following pair of fractions: 12 and 13.

Q6:

Find the LCD of the following pair of fractions: 35 and 611.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.