When 50 per cent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number?  Select:
A) 3 : 4 B) 4 : 5 C) 3 : 2 D) Data inadequate E) None of these
Let the first and the second numbers be x and y respect then   y + 50% of x = 140% of y   or, y + 0.5x = 1.4y   or, 0.5x = 0.4y   ∴ x : y = 0.4 : 0.5 = 4 : 5   Answer 4 : 5
<result>B</result>
When 50 per cent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number?