Compound Inte r est. Suppose you take out a $1,000, 3-year loan using add-on interest (see previous problem) with a quoted interest rate of 20 percent per year. What will your monthly payments be? (Total payments are $1,000 + $1,000 × .20 × 3 = $1,600.) What are the true APR and effective annual rate on this loan? Are they the same as in the previous problem?