Fluffy laundry detergent reduced its regular size from $4\mathrm{.}6$ kg to $4$ kg$.$ The retail price dropped from $$12\mathrm{.}19$ to $$11\mathrm{.}00.$ What was the percent change in the unit price?$($Do not round intermediate calculations. Input the amount as a positive value. Round your final answer to $2$ decimal places.$)$