A number is decreased by 30% and the decreased number is increased by 30%. Find the net increase or decrease percent.
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Let the number is increased by 10%
x+10010x=1011x
The number is decreased by 10%
=1011x−1011x×10010
=1011x−10011x=10099x
Decrease in percentage is
Decrease =x−10099x=100x
So, Decrease %
=x100x×100%
=1%
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