Can anybody explain to me how to calculate the net promoter % and the net detractors%

Joe's, a department store chain, has conducted a survey to collect data on customer satisfaction and perception of its merchandise and service. Data for responses to the question "How likely is it that you would recommend Joe's to a friend or colleague?" appear below. (Click the icon to view the data.) X Requirement What is Joe's net promoter score? Data table . . . Number of Begin by calculating the percentage of total for each score type. (Round percentages to the nearest hundredth percent, X.XX%. Score Responses Percentage of 1,250 Score total 2,630 12.50 2,540 26.30 490 25.40 1,040 4.90 1,000 CO 10.40 690 LO 10.00 130 6.90 1.30 160 0.70 1.60 Total 10,000 Determine the formula, then calculate the net promoter score. (For any percentages entered, enter to the nearest hundredth per Net promoters % Net detractors % Net promoter score 38.80 30.90 Print 7.90 Done