A merchant marks goods up by 75% and then offers a discount on the marked price. The profit that the merchant makes after offering the discount is 22.5%. What % discount did the merchant offer?
Choose one:
A) 20%	B) 25%	C) 30%	D) 35%	E) 40%
Let P be the original price of the goods and let x be the rate after the markup.   (1.75P)*x = 1.225P   x = 1.225/1.75= 
<gadget id="calculator">1.225/1.75</gadget>
<output>0.7</output>
0.7 which is a discount of 30%.   The answer is 30%.
<result>C</result>
A merchant marks goods up by 75% and then offers a discount on the marked price. The profit that the merchant makes after offering the discount is 22.5%. What % discount did the merchant offer?