A physical quantity $C$ is related to four other quantities $p, q, r$ and $s$ as follows $$ C=\frac{p q^2}{r^3 \sqrt{s}} $$ The percentage errors in the measurement of $\mathrm{p}, \mathrm{q}, \mathrm{r}$ and s are $1 \%, 2 \%, 3 \%$ and $2 \%$, respectively. The percentage error in the measurement of $C$ will be $\_\_\_\_$ $\%$.