(Click the icon to view the data.) Read the requirements. the step-down method. First, rank, from highest to lowest, the support departments based on the percentage of their services provided to other support departments. (Round parcentages to five decimal places.) parentheses or a minus sign when decreasing departments by allocating costs. Enter a " 0 " for any zero balances.) Data table (Click the icon to view the data.) Read the requirements. ne step-down method