Task: Question Answering
Input (English): Problem: the population of a city increases by 5 % per year but due to migration it decrease by 1 % per years . what will be the percentage increase in population in 3 years ? 
Options: a ) 9 % , b ) 9.27 % , c ) 27 % , d ) 12.48 % , e ) none of these
Output (English): d