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 180 and 108 is 72 (180 - 108 = 72).

Next, we need to find the average of the two numbers. The average of 180 and 108 is (180 + 108) / 2 = 144.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 180 and 108 is (72 / 144) x 100 = 50%.

Therefore, the percentage difference between 180 and 108 is 50%. This means that 108 is 50% less than 180, or that 180 is 50% more than 108.