When 50% of a number A is added to B, the second number B increases by 25%. The ratio between the numbers A and B is:

3 : 2 2 : 3 1 : 2 3 : 4

1 : 2

25% = \(\frac{1}{4}\) & 50% = \(\frac{1}{2}\) ATQ, \(\frac{1}{2}\) × A + B = \(\frac{5}{4}\) × B \(\frac{A}{2}\) = \(\frac{5B}{4}\) - B A = \(\frac{1}{2}\) × B So ,  A  :   B  = 1 : 2