The formula is
A=p (1+r)^t
A future value
P present value
R interest rate
T time
To find the present value solve the formula for p
P=A÷(1+r)^t
The present value if you can earn
5.5% is
P=25,000÷(1+0.055)^(6)
P=18,131.15
The present value if you can earn 5% is
P=25,000÷(1+0.05)^(6)
p=18,655.38
The difference
18,655.38−18,131.14
=524.24. .....answer