Estimating Useful Life and Percent Used Up The property and equipment footnote from the Deere \& Company Equipment and Operations segment follows. Property and Depreciation A summary of property and equipment at October 31 follows. a. Compute the average useful life of Deere's depreciable assets at year-end 2015. Round answer to one decimal place. x years b. Estimate the percent used up of Deere's depreciable assets at year-end 2015. Round answer to one decimal place (ex; 0.2345=23.5% ) x x