You are the manager of a popular shoe company. You know that the advertising elasticity of demand for your product is $0\mathrm{.}15.$ How much will you have to increase advertising in order to increase demand by $10\%?$

a$.0\mathrm{.}02\%$

b$.66\mathrm{.}7\%$

c$.4\mathrm{.}3\%$

d$.38\mathrm{.}6\%$