Answer:
The calculations are shown below.
Explanation:
In order to compute the percentage rate we have to assume the initial cost be $100
So the percentage rate for the following years could be as follows
(a) 4 years = $100 ÷ 4 = 25%
(b) 8 years = $100 ÷ 8 = 12.5%
(c) 10 years = $100 ÷ 10 = 10%
(d) 16 years = $100 ÷ 16 = 6.25%
(e) 25 years = $100 ÷ 25 = 4%
(f) 40 years = $100 ÷ 40 = 2.5%
(g) 50 years = $100 ÷ 50 = 2%
By dividing the initial cost by the number of years we can get the percentage rate and the same method is applied