Answer:
0.0515 or 5.15%
Explanation:
Given that
Monthly saving (C) = $20
Time (n) = 17 years × 12 months = 204 months
Future value (F) = $6,528.91
Using Future value if annuity due formula:
F = C × (1+r) × [{(1+r) ^n - 1 } ÷ r ]
$6,528.91 = $20 × (1+r) ×[{(1+r) ^204 - 1 } ÷ r ]
After solving this, the r value is
= 0.004288
Now
The annual rate of return is
= 0.004288 × 12 months
= 0.0515 or 5.15%
We simply applied the above formula to get the rate of return