A solid box is 15 \mathrm{~cm} by 10 \mathrm{~cm} by 8 \mathrm{~cm}. A new solid is formed by removing a cube 3 \mathrm{~cm} on a side from each corner of this box. What percent of the original volume is removed?
Answer Choices
A. 4.5
B. 9
C. 12
D. 18
E. 24