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Question

A number is increased by 20% and then decreased by 20%. Find the net increase or decrease per cent.

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Solution

Let the number =100
Number after 20% increase =100+20=120
Decrease in the new number
=20% of 120=120100×120=24
Final number =12024=96
Net decrease =10096=4
Hence, there is a net decrease of 4%.

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