What is the calculation formula for motorcycle depreciation rate?

[DeJosie]

Motorcycle depreciation rate is generally 10%, the calculation formula: (Motorcycle purchase cost - Estimated residual value) / Estimated service life (5~8 years) = Annual depreciation amount Annual depreciation amount / 12 = Monthly depreciation amount. However, it has low practical application value and is rarely used. Depreciation periods: Generally divided by scrapping time into three depreciation periods for used motorcycles: first 3 years, starting from the 4th year, and the last 3 years before scrapping time. Depreciation calculation: The first 3 years have an annual depreciation rate of 11%, with a total 3-year depreciation rate of 33%. Starting from the 4th year, the annual depreciation rate is 10%, with a total depreciation rate of 40%. The last 3 years have an annual depreciation rate of 9%, with a total depreciation rate of 27%. The total 10-year depreciation rate is: 33% + 40% + 27% = 100%.