13 This is the income that Highfield Sports Club has made over the past 8 weeks. 6 7 8 Week 2 Income 9.5 4.5 6.8 8.4 4.5 6.2 9.4 7.5 (in thousands E) The mean income for the same 8-week period last year was $8,500. You know the income has decreased this year. Calculate the percentage decrease of the mean income. Give your answer to 2 decimal places Show your working out and write the answer in the box below. (6 ma