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Least Common Denominator

Grades 4–5

Definition

The least common denominator (LCD) is the smallest number that is a common denominator of two or more fractions. It is the least common multiple of the denominators.

Examples

  • The LCD of 1/3 and 1/4 is 12.
  • The LCD of 1/2 and 1/5 is 10.
  • The LCD of 1/6 and 1/4 is 12.

Related Terms

Practice Worksheets