If 40 per cent of a number is added to an other number then it becomes 125 per cent of itself. What will be the ratio of first and second numbers?
Options:
(A) 8 : 5
(B) 5 : 7
(C) 5 : 8
(D) Data inadequate
(E) None of these OK. Let's think. Some random thoughts first:
40x100 + y = 125x100 xy = 2017 The answer: (E).