# 12.9: Division of Rational Expressions

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**At Grade**Created by: CK-12
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Least Common Denominator

Least Common Denominator

The least common denominator or lowest common denominator of two fractions is the smallest number that is a multiple of both of the original denominators.Least Common Multiple

Least Common Multiple

The least common multiple of two numbers is the smallest number that is a multiple of both of the original numbers.Rational Expression

Rational Expression

A rational expression is a fraction with polynomials in the numerator and the denominator.### Image Attributions

## Description

Divide rational expressions involving monomials and polynomials.

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## Date Created:

Oct 01, 2012## Last Modified:

Oct 28, 2014## Vocabulary

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