40% of 60% of 3/5 th of a number is 504. What is 25% of 2/5 th of that number ?

Answer: Option C

Let the number be x
Then, 40% of 60% of $$\frac{3}{5}$$ of x = 504
⇒ $$\frac{40}{100}$$ × $$\frac{60}{100}$$ × $$\frac{3}{5}$$ × x = 504
⇒ $$\frac{18}{125}$$x = 504
⇒ x = $$\frac{504\times 125}{18}$$
⇒ x = 3500
∴ 25% of $$\frac{2}{5}$$ of 3500 :
= $$\frac{25}{100}$$ × $$\frac{2}{5}$$ × 3500
= 350