$7\mathrm{.}8($a$)$ Calculate the percentage change in $K_x$ for the reaction $H_{2}CO(g)$

$CO(g)+H_2(g)$ when the total pressure is increased from $1\mathrm{.}0$ bar to $2\mathrm{.}0$ bar at

constant temperature. show all the relations between K$,$ Kx and Kp