Rational and Irrational Numbers what is it explain

Rational numbers can be expressed as fraction decimal or percentage but irrational numbers cannot be written as two integers

A rational number is part of a whole expressed as a fraction, decimal or a percentage ... It is a number that cannot be written as a ratio of two integers (or cannot be expressed as a fraction). For example, the square root of 2 is an irrational number because it cannot be written as a ratio of two integers.