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Rational

[Mathematics] a fractional number n/d, where n and d are integers, n is the numerator and d is the denominator.

The set of all rational numbers is usually called Q. Computers do not usually deal with rational numbers but instead convert them to real numbers which are represented (approximately in some cases) as floating-point numbers. Compare irrational.

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RatC RATEL Rate monotonic scheduling RATFIV RATFOR	Adaplex Advanced Research Projects Agency Network Aeolus ALTRAN axiomatic semantics	RATional Fortran Rationalized C rave rave on! raw data