price of an article is fast increased by 40% and then reduced by 20% . what is the percentage increase in its price ?
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=40-20-(40×20)/100
= 20-(800)/100
= 20-8
= 12 %
net percent change = x × y +(xy)/100
negative sign for reduction
= 20-(800)/100
= 20-8
= 12 %
net percent change = x × y +(xy)/100
negative sign for reduction
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