Task: Question Answering
Input (English): Problem: if 80 % of a number is equal to four - third of another number , what is the ratio of first number to the second number ? 
Options: a ) 5 : 3 , b ) 1 : 4 , c ) 3 : 7 , d ) 6 : 11 , e ) 2 : 3
Output (English): a