The percentage difference between 125 and 25 is calculated by finding the absolute difference between the two numbers, which is 100, and then dividing it by the average of the two numbers, which is 75. This gives us a result of 133.33%, which means that 125 is 133.33% greater than 25.

To understand this concept better, let's break it down step by step.

First, we need to find the absolute difference between the two numbers. Absolute difference means the difference between two numbers without considering their signs. In this case, the absolute difference between 125 and 25 is 100.

Next, we need to find the average of the two numbers. The average of 125 and 25 is (125+25)/2 = 75.

Now, we divide the absolute difference by the average and multiply by 100 to get the percentage difference.

(100/75) x 100 = 133.33%

This means that 125 is 133.33% greater than 25.

In summary, the percentage difference between two numbers is a measure of how much one number is greater or smaller than the other, expressed as a percentage of the average of the two numbers.