At an output level of $40,000$ units, you calculate that the degree of operating leverage is $3\mathrm{.}9.$ if the cutput rises to $44,000$ units, what will the percentage change in operating cosh flow be$?($Do not round intermediate calkulations and enter your answer as a percent rounded to $2$ decimal ploces, e$.$g$.,32\mathrm{.}16.)$

Percentage change in OCF