Any number that can be represented as the quotient of two integers (i.e., the denominator cannot equal zero). The set of rational numbers includes all integers as well as all fractions. In decimal form, rational numbers are either terminating or repeating decimals.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on rational number, visit Britannica.com.
Seen & Heard
What made you look up rational number? Please tell us what you were reading, watching or discussing that led you here.