A is 40% more than B, and B is 50% less than C. If C is 25% more than D, then A is what percentage less than D?

12.5%

40% = \(\frac{2}{5}\)

50% =  \(\frac{1}{2}\)

25% =  \(\frac{1}{4}\)

                A     :     D

40% ⇒     7     :     5     

50% ⇒     1     :     2

25% ⇒     5     :     4   

   7 × 1 × 5     :     5 × 2 × 4

           7          :          8           = 1 (difference)                       

A is = \(\frac{1}{8}\) × 100 = 12.5 % less than D.