Photocopier enlarging dimensions question

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Oct 22, 2017
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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?

I don't know how to do this can someone show the steps for it.
 
What you need to do is to reverse what Denis did. If we gave you the end result, 225, what could you do to find the starting number, 100? You can do it all in one step, or in two steps.

Then you'll do the same thing with your numbers
 
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