Hi Compound Interest: A = Accumulated Amount P= principal = r= annual rate = . n= periods per year = t= years = A =A(1year) = 15000(1.045)^1 = 15675.00 (I = 675) A(2years) = 15000(1.045)^2 = 16380.38 I = 1350 - 675 = 705.38 (2nd year) Simple Interest: I = P*r*t 15000(.045)(1) = $675 15000(.045)(2) = 1350 - 675 = $675 second year Wish You the Best in your Studies.