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: if 45 % of z is 96 % of y and y is 75 % of x , what percent of x is z ? 
Options: a ) 200 , b ) 160 , c ) 100 , d ) 65 , e ) 50
b

Problem: a sells a bicycle to b and makes a profit of 25 % . b sells the same bicycle to c at a profit of 25 % . if the final s . p . of the bicycle was rs . 225 , find out the cost price of the bicycle for a . 
Options: a ) 237 , b ) 126 , c ) 971 , d ) 611 , e ) 144
e

Problem: the salary of a worker is first increased by 25 % and afterwards reduced by 25 % . what is the net change in the worker ' s salary ? 
Options: a ) 3.25 % increase , b ) 3.25 % decrease , c ) 6.25 % increase , d ) 6.25 % decrease , e ) no change

d