A rational number can be express as a fraction or ratio of real numbers. An irrational number cannot be expressed as a fraction or its decimal equivalent goes on forever like or
I hope the above explanation was helpful.
For Step-By-Step videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonmetry please visit http://www.FreedomUniversity.TV/courses/Trignometry.
Also, good luck in your studies and contact me at john@e-liteworks.com for your future math needs.