Task: Question Answering
Input (English): Problem: if two positive numbers are in the ratio 1 / 9 : 1 / 7 , then by what percent is the second number more than the first ? 
Options: a ) 67 % . , b ) 70 % . , c ) 60 % . , d ) 28.6 % . , e ) 80 % .
Output (English): d