Math Medics
S.o.s. Math: Simple Fractions
This S.O.S. tutorial gives students a basic review of simple fractions. Follow the tutorial to refresh your skills involving simple fraction manipulations. Each section contains problems with links to the answers.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Complex Rational Expressions
Learn to simplify complex fractions via this tutorial that features various methods for simplifying, example problems with step-by-step solutions, and practice problems, complete with answers and discussions.
Khan Academy
Khan Academy: Reducing Rational Expressions to Lowest Terms
Learn what it means to reduce a rational expression to lowest terms, and how it's done!
Math Medics
S.o.s. Math: Reducing Fractions
Explains step-by-step how to reduce fractions. Gives examples and exercises to practice this skill.
Help Algebra
Help algebra.com: Fractions
This resource offers an overview of fractions from several aspects, including simplifying, reduced, mixed numbers and improper form, and basic operations. Examples and diagrams are included to help demonstrate each topic.
CK-12 Foundation
Ck 12: Algebra: Excluded Values for Rational Expressions
[Free Registration/Login may be required to access all resource tools.] Reduce rational expressions involving fractions to simplest terms and find their excluded values.
Wyzant
Wyzant: Fraction Simplifying Calculator
This WyzAnt applet allows the user to input fractions--improper or mixed numbers--and have the calculator reduce the fraction or convert it into a mixed number. A good resource for checking students work.
Khan Academy
Khan Academy: Intro to Rational Expressions
This lesson will introduce you to rational expressions. You will learn how to determine when a rational expression is undefined and how to find its domain.