SOLUTION: A 3x5 photograph is enlarged to 5x7 size.What is the percent increasing in area.

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Question 1075441: A 3x5 photograph is enlarged to 5x7 size.What is the percent increasing in area.
Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!
The 3×5 photo's area is (3 in)×(5 in) = 15 in²
The 5×7 photo's area is (5 in)×(7 in) = 35 in² 

Another way to do it is:

We ask ourselves:

35 is how much more than 15?

To answer that we subtract 35-15 and get 20 more.

Then we ask ourselves:

What percent of 15 is 20?

We divide the "IS" number 20 by the "OF" number 15
and get 1.33..., or  then we change that to a percent.

133.333...% or % increase

Either way!

Edwin
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