Rational Numbers
Rational Numbers
All positive and negative fractions,
including integers and so-called improper
fractions. Formally,
rational numbers are the set of all
real numbers that can be written
as a ratio of integers with nonzero denominator.
Rational numbers are
indicated
by the symbol 
.
Note: Real numbers that aren't rational are called irrational.
See also
Natural numbers, whole numbers, algebraic numbers, imaginary numbers, complex numbers, transcendental numbers