Olivia is 48 inches tall, and 2/3 as tall as her brother Cameron. In inches, how tall is Cameron?

Question

 The part, 2/3, is a fraction and this needs to be answered because none of my family understands it.

Answer 1

2/3=48/X Then you cross multiply.  You will get 2X = 144, you divide both sides by 2 to get X alone and your answer is X= 72.

Does that make sense?