Answer :
Bob = 27
Charles = 2/3 * Bob
Charles = 2/3 * 27
Charles = 54/3
Charles = 18
Jim = 3 * Charles
Jim = 3 * 18
Jim = 54
Jim has 54 comic books.
Charles = 2/3 * Bob
Charles = 2/3 * 27
Charles = 54/3
Charles = 18
Jim = 3 * Charles
Jim = 3 * 18
Jim = 54
Jim has 54 comic books.