Relative lowering of vapour pressure of a dilute solution is 0.2. What is the mole-fraction of the non-volatile solute?

according to Raoult’s law the relative lowering in vapour pressure of an ideal solution containg the non-volatile solute is equal to the molefraction of the solute.
$\therefore$ Relative lowering of vapour pressure =0.2.
$\therefore$Molefraction of the solute=0.2.