In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: there are 200 employees in a room . 99 % are managers . how many managers must leave the room to bring down the percentage of managers to 98 % ? 
Options: a ) 150 , b ) 100 , c ) 99 , d ) 50 , e ) 25
[EX A]: b

[EX Q]: Problem: a certain company reported that the revenue on sales increased 15 % from 2000 to 2003 , and increased 30 % from 2000 to 2005 . what was the approximate percent increase in revenue for this store from 2003 to 2005 ? 
Options: a ) 50 % , b ) 40 % , c ) 35 % , d ) 32 % , e ) 13 %
[EX A]: e

[EX Q]: Problem: the price of a coat in a certain store is $ 500 . if the price of the coat is to be reduced by $ 400 , by what percent is the price to be reduced ? 
Options: a ) 10 % , b ) 15 % , c ) 20 % , d ) 25 % , e ) 80 %
[EX A]:
e