Question 262689
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Each side of a rectangle is increased by 100% .By what percentage does the area increase?
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        The answer in the post by @mananth is incorrect.


        This problem is very simple,  but due to this reason,

        it is extremely important to give a correct and straightforward answer,

        which is  DIFFERENT  from the answer by @mananth.



<pre>
New sides of the rectangle are 2x and 2y linear units.

New area of the rectangle is (2x)*(2y) = 4xy square units, 
or 4 times the area of the original rectangle.


    The percentage of increase the area is  {{{(New_area - Old_area)/Old_area}}} = {{{(4xy - xy)/(xy)}}} = {{{(4-1)/1}}} = 3 = 300%.


<U>ANSWER</U>.  The percentage of the area increase is 300%.
</pre>

Solved and presented straightforward from the beginning to the end, 
without making any zigzags in the solution and/or in the explanation.