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 130 is 50 (180 - 130 = 50).

Next, we need to find what percentage of the original number the absolute difference represents. To do this, we divide the absolute difference by the original number (130) and then multiply by 100 to get the percentage.

So, the percentage difference between 180 and 130 is:

(50 / 130) x 100 = 38.46%

Therefore, the percentage difference between 180 and 130 is 38.46%. This means that 130 is 38.46% less than 180.