If \(A : B = \frac{1}{2} : \frac{1}{3}\), \(B : C = \frac{1}{5} : \...

If \(A : B = \frac{1}{2} : \frac{1}{3}\), \(B : C = \frac{1}{5} : \frac{1}{3}\), then \((A+B):(B+C)\) is equal to