One-fifth of half of a number is 20. Then 20% of that number is :

Answer: Option D

Let the number is = x
According to the question,
$$\frac{1}{5}$$ of $$\frac{1}{2}$$ of x = 20
$$\frac{1}{5}$$ × $$\frac{1}{2}$$ × x = 20
x = 200
∴ 20% of 200 :
= $$\frac{20}{100}$$ × 200 = 40