Concept:Convert all fractions to a common denominator to compare them easily.Explanation:Find the LCM of denominators 15, 5, 7, and 3. The LCM is 105.Convert each fraction: 8/15 = 56/105, 3/5 = 63/105, 4/7 = 60/105, 2/3 = 70/105.Compare numerators: 56 < 60 < 63 < 70.Thus the ascending order is 8/15 < 4/7 < 3/5 < 2/3.Answer:Option B is correct.