A family made a down payment of $100
and borrowed the balance on a set of
encyclopedias that cost $400. The
balance with interest was paid in 20
monthly payments of $17.2 each and a
final payment of $3. The amount of
interest paid was what percent of the
amount borrowed?	Pick one:
A) 6% B) 12% C) 14% D) 15.6% E) 20%
interest paid = 17.2*20+3 - 300= 
<gadget id="calculator">17.2*20+3 - 300</gadget>
<output>47</output>
47   % off the balance= (47/300) * 100 = 15.67%   Answer is 15.6%.
<result>D</result>
A family made a down payment of $100
and borrowed the balance on a set of
encyclopedias that cost $400. The
balance with interest was paid in 20
monthly payments of $17.2 each and a
final payment of $3. The amount of
interest paid was what percent of the
amount borrowed?