Question

explain how to the number is irrational briefly

Answer 1

a number which cannot be expressed in the form of p/q is known as irrational number
or
a number which is non repeating and non terminating is known as irrational number

Answer 2

a real number that cannot be written as a simple fraction-the decimal goes on forever without repeating.
for example:- pi is an irrational number.
pi = 3.14159 = ?/? ( no ratio )