N’olwekyo omugereko (set) gwa namba ez'emigerageranyo (rational numbers) gwonna guba gwefaananyirizaako bwe guti: (5/9, -7, 2.15, -103/13, n’endala. Namba yonna eyinza okuwandiikibwa nga omukutule eyitibwa ya mugerageranyo(Rational Number). Kino kitegeeza singa x ne y ze namba kibalirampuyibbiri (integers), kitegeeza x/y namba ya mugerageranyo.