Positive rational numbers were widely used in Egypt in the centuries before Christ. After years as nomads, homo sapiens began the agricultural revolution and with it, the need to use rational numbers. Their use in land markings was the main need for the use of these numbers. On the Nile River, land flooding forced land to be re-marked. In this way, rational numbers were used to remark the lands. Definition Until now, in the history of mathematics, we have noticed that rational numbers are represented by a fraction in which: