If your algebraic expression is a ratio of two polynomials then you have a rational expression. Find out what that might look like.

A rational expression has a polynomial in the numerator as well as a polynomial in the denominator. The instructor writes out an example for you to see.

This QuickTime movie provides an opportunity to compare fractions with the same denominator. As you watch and listen to the teacher and students interact it helps clarify this concept.

Sal Khan compares fractions with unlike denominators by drawing bars