To find the percentage difference between two numbers, we first need to find the absolute difference between them. In this case, the absolute difference between 54 and 75 is 21 (75 - 54 = 21).

Next, we need to find the average of the two numbers. The average of 54 and 75 is (54 + 75) / 2 = 64.5.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 54 and 75 is (21 / 64.5) x 100 = 32.56%.

Therefore, the percentage difference between 54 and 75 is 32.56%. This means that 75 is 32.56% more than 54.