The rate of return is the amount received on top of the cost of the initial investment divided by the initial investment made.
Profit = $17,000 - $20
Profit = $16,980
Dividing the calculated by the initial investment and the number of years.
Rate of return = (($16980/$20)(100%) / (2014 - 1871)
Rate of return = (84900%) / 143
= 593.71%
ANSWER: 593.71%