
Glossary: Prime Pages: Top 5000: 
In mathematics rational means "ratio like." So a
rational number is one
that can be written as the ratio of two integers.
For example 3=3/1, 17,
and 2/3 are rational numbers.
Most real numbers (points on the numberline) are irrational (not rational). The rational numbers are those which have repeating decimal expansions (for example 1/11=0.09090909..., and 1=1.000000...=0.999999...). They are also those which have terminating continued fraction expansions. Finally, the real number x is rational if and only if there are finitely many solutions to x  a/b < 1/b^{2}.
See Also: IrrationalNumber, AlgebraicNumber
Chris K. Caldwell © 19992018 (all rights reserved)
