In the following reaction,

the $$\%$$ yield for reaction I is $$60\%$$ and that of reaction II is $$50\%$$. The overall yield of the complete reaction is ______ $$\%$$.

We are given a two-step reaction where the yield of reaction I is 60% and the yield of reaction II is 50%.

The overall yield of a multi-step reaction is the product of the individual yields of each step.

Overall yield = Yield of Step I $$\times$$ Yield of Step II

$$\text{Overall yield} = \frac{60}{100} \times \frac{50}{100} = 0.6 \times 0.5 = 0.3$$

Converting to percentage:

$$\text{Overall yield} = 0.3 \times 100 = 30\%$$

Therefore, the overall yield of the complete reaction is $$\textbf{30}$$ %.