Convert each of the following estimates of useful life to a straight-line depreciation rate, stated as a

Question:

Convert each of the following estimates of useful life to a straight-line depreciation rate, stated as a percentage, assuming that the residual value of the fixed asset is to be ignored:
(a) 2 years,
(b) 4 years,
(c) 10 years,
(d) 20 years,
(e) 25 years,
(f) 40 years,
(g) 50 years.