Answer:
0.2571 or 25.71%
Explanation:
In this case, even though the initial amount invested is not given, it can be found by subtracting the amount by which the investment appreciated of the year-end value:
[tex]A = \$1,300 - \$250\\A = \$1,050[/tex]
The return rate is given by the interest payed added to the amount appreciated, divided by the initial investment:
[tex]r=\frac{\$250+\$20}{\$1,050} \\r=0.2571= 25.71\%[/tex]
The customer's total return is 0.2571 or 25.71%