Answer the following question, with explanation first.
Mark can jump 6 inches off the ground. Lisa can jump double the height as Mark, and Jacob can jump double the height of Lisa. If James jumps 2/3 as high Jacob, how high can James jump?

16
Lisa can jump 6 * 2 = 12 inches.

Jacob can jump 12 * 2 = 24 inches.

James can jump 24 * (2 / 3) = 16 inches high.

.

Thus, the answer is 16