Task: Question Answering
Input (English): Problem: alfred buys an old scooter for $ 4700 and spends $ 800 on its repairs . if he sells the scooter for $ 6400 , his gain percent is ? 
Options: a ) 5.45 % , b ) 16.36 % , c ) 7 % , d ) 8.12 % , e ) 10 %
Output (English): b