Vera is a shop manager. She has this information about the income in her shop for eight weeks this year. Week 1 2 3 4 5 6 7 8
Income (thousands of £) 53.5 42.3 39.8 45.1 52.4 19.4 47.9 42.5
The median income for the same eight weeks last year was £49 300 Vera knows that the median income for these eight weeks has decreased this year compared to last year.
Work out the percentage decrease of the median income.
Give your answer to 2 decimal pleases