Let the SP of an Article be 100x .
Selling the article man make a profit of 25% on SP
Profit=10025×(100x)
Profit=25x
Profit = 25x ; SP = 100x
then, CP=100x−25x=75x
Profit % =CPprofit×100
=75x25x×100
=3100%
=3331%
Profit % on the article is 3331%.