A rational number is a number that can be expressed as a quotient or fraction (fraction) of two integers, a and b, where b is not zero. For example, 1/2, -3/4, and 7/5 are all rational numbers.
rational numbers are important because they can be used to represent many different quantities in the real world. For example, they can be used to represent measurements of length, weight, and time. Rational numbers are also used in many different mathematical applications, such as calculus and algebra.