Steps-
(i) CC is the given consumption curve on Y axis. Take OS1 equal to OC.
(ii) Draw a 45o line from the point of origin. It intersects CC at B.
(iii) From point B draw a perpendicular on OX which cuts OX at B1.
(iv) Join S1 and B1 by a straight line and extend it to S.
(v) SS1 is the saving curve.