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: if 5 x = 6 y and xy ≠ 0 , what is the ratio of 1 / 3 * x to 1 / 5 * y ? 
Options: a ) 25 / 6 , b ) 36 / 25 , c ) 2 , d ) 5 / 6 , e ) 25 / 36
[EX A]: c

[EX Q]: Problem: if a ' s height is 45 % less than that of b , how much percent b ' s height is more than that of a ? 
Options: a ) 66.66 % , b ) 81.81 % , c ) 66.766 % , d ) 86.66 % , e ) 66.65 %
[EX A]: b

[EX Q]: Problem: if ' a ' and ' b ' are non - zero numbers such that their sum is 6 times the product , what is the value of 1 / a + 1 / b ? 
Options: a ) 5 , b ) 6 , c ) 7 , d ) 8 , e ) 12
[EX A]:
b