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 23 and 50 is 27 (50 - 23 = 27).

Next, we need to find the average of the two numbers. The average of 23 and 50 is (23 + 50) / 2 = 36.5.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 23 and 50 is (27 / 36.5) x 100 = 73.97%.

This means that the second number (50) is 73.97% greater than the first number (23).