Question

the price of an article is increased by 25% by how much percentage must this new price be decreased to retain its formal price

Answer 1

20 % decrease to retain its formal price

Answer 2

let price of an article be x. when increased by 25%
it becomes 1.25x. So let's take decrease% be y% it becomes x. (100-y)/100(1.25x)=1x => 100-y=0.8(100)
=>100-y=80=>20=y So new price has to be decreased by 20% to retain its formal price.