Amanani a-rational, ii-Rational numbers ke ngesiNgesi ngamanani anokubhalwa njenee-fractions. Oku kuthetha ukuthi asenokubhalwa njengamanani anokohlulwa-hlulwa ngo-b, kodwa oko kunokwenzeka kuphela xa amanani angu- a no- b ezii-integers, kuyo yonke loo nto siqiniseke okokuba u-b akalingani no-0.