Sandy buys an old scooter for $900 and spends $300 on its repairs. If Sandy sells the scooter for $1500, what is the gain percent?
Select:  A) 10%  B) 15%  C) 20%  D) 25%  E) 30%
selling price / total cost = 1500/1200= 
<gadget id="calculator">1500/1200</gadget>
<output>5/4 = around 1.25</output>
1.25   The gain percent is 25%.   The answer is 25%.
<result>D</result>
Sandy buys an old scooter for $900 and spends $300 on its repairs. If Sandy sells the scooter for $1500, what is the gain percent?