In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: two numbers are less than a third number by 40 % and 47 % respectively . how much per cent is the second number less than the first ? 
Options: a ) 95 % , b ) 88 % , c ) 85 % , d ) 90 % , e ) none of these
[EX A]: b

[EX Q]: Problem: if the price of gasoline increases by 25 % and a driver intends to spend only 5 % more on gasoline , by how much percent should the driver reduce the quantity of gasoline that he buys ? 
Options: a ) 20 % , b ) 16 % , c ) 15 % , d ) 12 % , e ) 10 %
[EX A]: b

[EX Q]: Problem: if the price of a certain computer increased 30 percent from d dollars to 377 dollars , then 2 d = 
Options: a ) 540 , b ) 570 , c ) 619 , d ) 649 , e ) 580
[EX A]:
e