What is the rate of compound interest per annum if a sum becomes $$\frac{64}{27}$$ times in 3 years?

A

$$21\frac{1}{3}$$ Percent

B

$$16\frac{1}{3}$$ Percent

C

$$33\frac{1}{3}$$ Percent

D

$$25\frac{1}{4}$$ Percent