Kapil bought a sofa set for Rs. 4500 and sold it for Rs. 4,200. Find his loss\%

Question

( A ) 5\large\frac{2}{3}\%
( B ) 6\large\frac{2}{3}\%
( C ) 6\large\frac{1}{3}\%
( D ) 6\large\frac{4}{3}\%