In decimal form, rational numbers are either terminating or repeating decimals. For example, 1/7 = 0.142857, where the bar over 142857 indicates a pattern that repeats forever. A real number that cannot be expressed as a quotient of two integers is known as an irrational number.
-5 is a rational number. it is a rational number because it is an integer and can be written as a fraction. if it was irrational it could not of been written as a fraction. [tex] \frac{ - 5}{10} [/tex]
