If the given two numbers are respectively 7% and 14% of a third number, then what percentage is the first of the second ?  Answers.
A) 20 %  B) 25 %  C) 18 %  D) 50 %  E) none of these

Rationale: "here , l = 7 and m = 14 therefore , first number = l / m x 100 % of second number = 7 / 14 x 100 % of second number = 50 % of second number answer : d"
Answer: D