Lisa can jump 6*2 =<<6*2=12>>12 inches.

Jacob can jump 12 *2 = <<12*2=24>>24 inches.

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

# Answer

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<|im_start|>system
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<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
16
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?
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