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 175 and 275 is 100 (275 - 175 = 100).

Next, we need to find the average of the two numbers. The average of 175 and 275 is (175 + 275) / 2 = 225.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 175 and 275 is (100 / 225) x 100 = 44.44%.

Therefore, the percentage difference between 175 and 275 is 44.44%. This means that the second number (275) is 44.44% greater than the first number (175).