A : B = 12 : 17 and A is 20% more than C. If B is 15% less than D, then C is what percentage of D?

47.5% 50% 52.5% 55%

50%

Given :-  A : B  =  12 : 17 Now , A is 20% more than C . i.e A  :  C = 6 : 5  OR  12 : 10 B is 15% less than D . i.e. B :  D = 85 : 100  B :  D = 17 : 20  So , Ratio of A , B , C & D  A   :     B  :  C   :  D  12  :   17  : 10   : 20 Required percentage = \(\frac{10}{20}\) × 100 = 50%