Answer:
future value = 232369.1361
return % = 384.10 %
Explanation:
given data
principal = $100 per month
time = 40 year = 480 months
rate = 6.25 % yearly = 0.0625 yearly = 0.005208 monthly
to find out
total amount of capital at the end of your investment and percentage is  your total return
solution
so here future value formula is
future value = P [tex]\frac{(1+r)^{t-1}}{r} * (1+r)[/tex] Â ..........1
here r is rate and t is time and P is principal
so put all value
future value = 100 [tex]\frac{(1+0.005208)^{480-1}}{0.005208} * (1+0.005208)[/tex]
future value = 232369.1361
so
Total capital at the end of investment-Total principle invested over the years
232369.1361 - 100 ( 12 × 40 )
184369.1361
so
Return % = [tex]\frac{184369.1361}{48000}[/tex] × 100
return % = 384.10 %
