Question 9cda93eb

$f\left(x\right)=\mathrm{5,470}{\left(0.64\right)}^{\frac{x}{12}}$

The function $f$ gives the value, in dollars, of a certain piece of equipment after $x$ months of use. If the value of the equipment decreases each year by $p\%$ of its value the preceding year, what is the value of $p$?