The sale price of the jacket that Sierra wants to buy = $120 Actual price of the jacket that Sierra wants to buy = $150 Amount of sale given on the jacket that Sierra wants to buy = (150 - 120) dollars = 30 dollars Percentage change in the price of jacket = (30/150) * 100 = (1/5) * 100 = 20 percent So the percentage change in the price of the jacket that Sierra wanted to buy was 20%. The correct option among all the options given in the question is option "C".I hope that the procedure is clear enough for you to understand.