Final answer:
Double-declining-balance depreciation is a method used in accounting to allocate the cost of an asset over its useful life.
Step-by-step explanation:
Double-declining-balance depreciation is a method used in accounting to allocate the cost of an asset over its useful life. The formula for calculating the depreciation expense using this method is (Cost - Accumulated Depreciation) x (2 / Useful Life). The cost refers to the original cost of the asset, while the accumulated depreciation represents the total depreciation expense charged to date. The useful life refers to the estimated time period during which the asset will be used before it is disposed of or replaced.