Rational numbers are the numbers that can be put in the form of the fraction
Ex:
[tex]2,\text{ }\frac{3}{4}\text{ , }\sqrt[]{25},\text{ }\frac{22}{7},\text{ 100, }\ldots[/tex]Irrational numbers are the numbers cannot be put in the form of the fraction
Ex:
[tex]\sqrt[]{7},\text{ }\sqrt[3]{24},\pi,\ldots\ldots[/tex]Let us check the question
[tex]\sqrt[]{16}=\sqrt[]{(4)(4)}=4[/tex]4 can be written in the form of the fraction, so it is a rational number
