LET the number be X81% of x = 0.81x49% of x = 0.49xDifference between 81% of x and 49% of x = 768⇒ 0.81x - 0.49x = 768⇒ 0.32x = 768⇒ x = 240048% of x = 0.48x = 0.48 × 2400 = 1152