Bangkok Broken. The Thai baht $($THB$)$ was devalued by the Thai government from THB$24\mathrm{.}76=$ USD$1\mathrm{.}00$ to THB$28\mathrm{.}96=$ USD$1\mathrm{.}00$ on July $2,1997.$ What was the percentage devaluation of the baht?

What was the percentage devaluation of the baht?

The percentage devaluation of the baht is

$\%.($Round to two decimal places.$)$