The formula for compound interest is as follows:
A = P (1 + r/n)^(nt)
A is the total money, P is the initial amount, r is the annual interest rate, n is the number of times a year the interest is compounded, and t is the years for which the money is invested.
Let's plug in your numbers.
A = 2550 + (1 + 1.03/1)^(1*1.5)
Simplify what's in the parentheses.
A = (2550) + (2.03)^(1.5)
Now take 2.03 to the power of 1.5.
A = (2550) + 2.89230479
Add.
A = 2552.8923
Which comes to roughly $2552.89.
