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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let marked price be x
Then net price or selling price will be x-12%x= 88/100x
CP= (88/100 multiplied by 100)divided by(100+21)
=88/121x
Now, the difference between marked price and cost price
=83/121x
Now percent, = 83/121x multiplied by reciprocal of cost price multiplied by 100
=23.97
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But how is the difference between MP and CP= 83/121xl; it should be 33/121x.So,consequently the percentage is 37.5%. Anyways your steps helped me to find the answer....

Let CP be 100...Since profit is 21% .
SP=100+21=121....discount is 12%...let MP be x.. Therefore (100-12)%Of x=121...88/100*x=121....x=12100/88=137.5.....MP-CP=137.5-100=37.5....Required percentage=37.5/100*100%=37.5%