A machine can process each unit of product A in 4 minutes and product B in 9 minutes. Product A has an annual demand of 8698 units, and product B has an annual demand of 7457 units. If the company decides to run one 8-hour shift for 250 days per year, what will be the annual capacity cushion of this machine? Provide your answer in percentage. If the answer is 0.272 then input 27.2. Do not input % symbol in the answer.