Electrochemistry · Molar conductivity and concentration

At 298 K, the molar conductivity of x% (w/w) MX solution (aqueous) is 123.5 S cm$^2$ mol$^{-1}$. The conductance of same solution is $1.9\times10^{-3}$ S. The value of x is $\times\,10^{-2}$.

(Given : cell constant $= 1.3$ cm$^{-1}$; molar mass of MX is 75 g mol$^{-1}$, density of aqueous solution of MX at 298 K is 1.0 g mL$^{-1}$)