class 8 question the price of an article has been increased by 25% by how much percent must this new price be decreased to retain its former price ?
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Step-by-step explanation:
let the older value be x.
therefore the new value will be x+25/100x
so no the new value would be 125/100x.
now we want to decrease to its original value .
take that y.
125/100x-y=x
y=125/100x-x
y=25/100x
percent=(25/100x )/(125/100x)*100
=25/125*100=20%
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