In the year-end clearance sale, a music system is discounted by \(d\%,\) and then it is discounted by another \(3d\%\)

[M7MBA]

In the year-end clearance sale, a music system is discounted by \(d\%,\) and then it is discounted by another \(3d\%\) on the previous discount amount. The original price of the music system is what percent of the final value if the initial discount percent is \(30?\)

A. \(23\%\)
B. \(40\%\)
C. \(143\%\)
D. \(233\%\)
E. \(1429\%\)

Answer: D

Source: e-GMAT