I am sorry that nobody responded to your post earlier.
If the dimensions are three times larger that means that the new photo will be 15 x 21 inches.
Find the area of the original photo by multiplying 5 x 7. Do the same for the new photo. Then divide the area of the new photo by the area of the old photo. This is your answer.
I hope this helps. Thanks for asking
dana has a photograph that is 4in.wide and 5in.long. she has the photoenlarged so that both dimensions are tripled. how many times larger than the original area will the area of the enlargement be?
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