When 35 per cent of a number is added to another number,the second number increases by its 20 per cent. What is the ratio between the second number and the first number? Choose the correct choice from the following:
A) 4 : 7	B) 7 : 4	C) 8 : 5	D) Data inadequate	E) None of these
35% of x + y = 120⁄100y   or 35x+100y/100=120y/100⇒35x=20y   y⁄x = 35⁄20 = 7 : 4   Answer 7 : 4
<result>B</result>
When 35 per cent of a number is added to another number,the second number increases by its 20 per cent. What is the ratio between the second number and the first number?