please help me with this problem, thank you

During the past year, the company's financial results reflected the following: Selling, general, and administrative expenses of 200,000 Net sales of 1,200,000 Interest expense of 100,000 Research & development expense of 50,000 Cost of goods sold of 800,000 Income tax expense of 1-7,500 a. Calculate gross profit % for the year. Display your answer to include one decimal point (.e. 12.3)