Alfred buys an old scooter for $4700 and spends $800 on its repairs. If he sells the scooter for $6400, his gain percent is?
Choose the most appropriate option:
A) 5.45%	B) 16.36%	C) 7%	D) 8.12%	E) 10%
C.P. = 4700+800= 
<gadget id="calculator">4700+800</gadget>
<output>5_500</output>
$5500   S.P.= $6400   Gain = 6400-5500= 
<gadget id="calculator">6400-5500</gadget>
<output>900</output>
$900   Gain%= 900/5500 * 100 = 16.36%   Answer is 16.36%
<result>B</result>
Alfred buys an old scooter for $4700 and spends $800 on its repairs. If he sells the scooter for $6400, his gain percent is?