White Tiger Electronics produces CD players using an automated assembly line process. The standard cost of CD players is $$152$ per unit $($labor$,$ $$29$; materials, $$75$; and overhead, $$48).$ The sales price is $$300$ per unit.

a$.$ To achieve a $12$ percent multifactor productivity improvement by reducing materials costs only, one needs to reduce the materials cost by percent. $($Enter your response as a percent rounded to two decimal places.$)$