The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: the ratio between b and y is 7 / 9 ; b and y are increased by 4 , what is the ratio between the new values of b and y ?
[EX A]: it can not be determine

[EX Q]: Problem: a cycle is bought for rs . 900 and sold for rs . 1080 , find the gain percent ?
[EX A]: 20 %

[EX Q]: Problem: ramesh purchased a refrigerator for rs . 12500 after getting a discount of 20 % on the labelled price . he spent rs . 125 on transport and rs . 250 on installation . at what price should it be sold so that the profit earned would be 18 % if no discount was offered ?
[EX A]:
1888