Rational numbers: Usually we call rational numbers that can be written in fractional form. A rational number is the ratio of an integer a and a positive integer b, such as 3/8, and the general rule is a/b. The decimal part of a rational number is a finite or infinitely recurring number. 0 is also a rational number. Integers and fractions are collectively called rational numbers. Integers can also be regarded as fractions with a denominator of one. For example, 4=4.0, 4/5=0.8,.

Irrational numbers: Real numbers that are not rational numbers are called irrational numbers, that is, the decimal part of an irrational number is an infinite non-cyclic number. Such as pi, √2 (root number 2), 1/3=0.33333...

Extended information:

Real numbers (real munber) are divided into rational numbers and irrational numbers.

Rational numbers are divided into integers and fractions

Integers are further divided into positive integers, negative integers and 0

Fractions are further divided into positive fractions and negative fractions

Positive integers and 0 are also called natural numbers

Reference: Baidu Encyclopedia - Rational Numbers