instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: the least whole number which when subtracted from both the terms of the ratio 6 : 7 to give a ratio less than 16 : 21 , is ? 
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 7
answer:
a


question:
Problem: if 0.4 of a number is equal to 0.07 of another number , the ratio of the numbers i 
Options: a ) 2 : 3 , b ) 7 : 40 , c ) 3 : 20 , d ) 20 : 3 , e ) none
answer:
b


question:
Problem: two numbers are in the ratio of 5 : 7 . if 25 is subtracted from each number , they are in the ratio of 5 : 9 . what are the two numbers ? 
Options: a ) 45 , 63 , b ) 50 , 70 , c ) 55 , 77 , d ) 60 , 84 , e ) 65 , 91
answer:

b