To find the percentage difference between two numbers, we first need to calculate the absolute difference between them. In this case, the absolute difference between 28 and 50 is 22 (50 - 28 = 22).

Next, we need to find the average of the two numbers. The average of 28 and 50 is (28 + 50) / 2 = 39.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 28 and 50 is:

(22 / 39) x 100 = 56.4%

Therefore, the percentage difference between 28 and 50 is 56.4%. This means that 50 is 56.4% more than 28.