Answer:
double declining balance method
Step-by-step explanation:
Depreciation is an accounting tool to allocate the cost of a long-term asset over time. The reasoning behind is the matching principle. If we associate the entire purchase value at the very first moment, then, one accounting period is taking a hit for an asset that will be use over several accounting periods.
The double declining method applies a rate twice as the straight-line method.
This is applied at the carrying value of the assets (book value) every year for each year of useful life.