The ratio of the ranch dressing to casar dressing in the buffet = 8:3 Number of cases ranch dressings in the buffet = 72 Let us assume the common ratio to be = x Then 8x = 72 x = 72/8 = 9 So The number of cases of casar dressing in the buffet = 3 * 9 = 27 So there are 27 cases of casar dressings in the buffet. I hope the procedure is clear enough for you to understand.