Choose the correct statements:

A. x% of y is equal to y% of 100 x.

B. If 40% of 60% of \(\left(\frac{3}{5}\right)\)of a number is 504, then 25% of \(\left(\frac{2}{5}\right)\)of that number is equal to 350.

C. If A is 15% more than B, then B is ∼13.04% less than A.

D. 10% of 5 and 5% of 10 add-up to 0.1.

Choose the correct answer from the options given below: