What is the rate of interest per annum for simple interest at which Rs.880 amounts to Rs.913 in $$1\frac{1}{2}$$ years?

A

$$2\frac{2}{3}\%$$

B

$$2\frac{1}{4}\%$$

C

$$2\frac{1}{2}\%$$

D

$$2\frac{1}{3}\%$$