rational expressions
posted by Mary .
I was asked how rational expressions might be used in my daily life, and I am at a loss.

Do you ever cut a cake into pieces? Are those rational numbers, or not? Do you ever make change? Do you ever measure fractions of cups of things?
Do you ever take a half breath? Geepers, you cant even breathe without math. 
Thank you for using the Jiskha Homework Help Forum. First of all, here's a definition of the term "rational expressions."
1. http://www.purplemath.com/modules/rtnldefs.htm
2. http://people.hofstra.edu/Stefan_Waner/tut_alg_review/unitA_6.html
3. http://tutorial.math.lamar.edu/Classes/Alg/RationalExpressions.aspx