To find n, we solve the equation 5 = (2/3)% of n. Converting the percentage to a fraction, (2/3)% is equal to 2/300 or 1/150. Therefore, 5 = n * (1/150). Solving for n, we get n = 5 * 150, which equals 750. Comparing the quantities, it is clear that 750 (Column A) is significantly greater than 15 (Column B). Consequently, the quantity in Column A is greater.