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You increase the size of a computer screen display by 20%. Then you decrease it by 20%. What is the size of the computer screen display now?

2 Answers

2 votes

Answer:

smaller than what u started with

Explanation:

User OFFLlNE
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5 votes

Answer: The size of computer display after 20 % increase and then 20 % decrease= 96 % of the original size.


Explanation:

Let the original size of computer be 100x , then if it increases by 20 %

then the new size of the computer=100x +20% of 100x


=100x+(20)/(100)*100x\\=100x+20x\\=120x

The size of computer after 20% increase= 120x

If size of computer is decreased by 20 % then

The new size of computer= 120x - 20% of 120 x


=120x-(20)/(100)*120x\\=120x-24x\\=96x

On comparing it to the original size , we get


(96x)/(100x)*100=96\%

Thus, the size of computer display after 20 % increase and then 20 % decrease= 96 % of the original size.

User Channing Huang
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