Julia+Challenge+Question

Question: Textbook pg 453 # 30 A photocopier was set to enlarge an original to 150% of its dimensions. A diagram of a rectangle was enlarged and then the image was enlarged again at the same setting. If the final rectangle measured 20.25 cm by 13.5 cm, what were the dimensions of the original rectangle on the original diagram? [|math sum_20110526_111909.pdf]