The values of $C$ and $n$ for raisin are $1.283 \times 10^{-4} \mathrm{~K}^{-1}$ and $1.02,$ respectively in the Henderson equation. The equilibrium moisture content of raisin in percent dry basis corresponding to the air with $70 \%$ relative humidity at $40^{\circ} \mathrm{C}$ is______________
The values of $C$ and $n$ for raisin are $1.283 \times 10^{-4} \mathrm{~K}^{-1}$ and $1.02,$ respectively in the Henderson equation. The equilibrium moisture content of raisin in percent dry basis corresponding to the air with $70 \%$ relative humidity at $40^{\circ} \mathrm{C}$ is______________