A rational number is a number that can be written as a fraction. Rational numbers are all real numbers, and can be positive or negative. A number that is not rational is called irrational.
An example is: 1.5 is a rational number because 1.5 = 3/2 (3 and 2 are both integers)
They can be expressed as fractions. > web's answer a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.
