Answer with explanation:
A number is said to be a Rational number if it can be written in the form of [tex]\frac{p}{q}[/tex] if p and q are Integers and q≠0.
A decimal number or Rational number in the decimal form Terminates or non terminating repeating.
An Irrational number has decimal expansion equal to non terminating non repeating decimal.
→0.9 = A Rational Number
→ A Rational Number × Another Rational Number= Rational Number
[tex]\rightarrow 0.9 \times \frac{2}{5}=\frac{1.8}{5}\\\\=0.36[/tex]
→0.36 is a rational number.
Option A: [tex]\frac{2}{5}[/tex]
