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'.

Problem: 30 is what percent of 100 ? 
Options: a ) 35 % , b ) 30 % , c ) 45 % , d ) 50 % , e ) 55 %
b

Problem: a shopkeeper has 280 kg of apples . he sells 85 % of these at 20 % profit and remaining 60 % at 30 % profit . find his % profit on total . 
Options: a ) 24 % , b ) 25 % , c ) 26 % , d ) 28 % , e ) 35 %
e

Problem: if the price of an article went up by 30 % , then by what percent should it be brought down to bring it back to its original price ? 
Options: a ) 25 % , b ) 23 1 / 13 % , c ) 16 7 / 3 % , d ) 16 6 / 3 % , e ) 16 2 / 3 %

b