To understand the percentage difference between 100 and 125, we first need to understand what percentage means. Percentage is a way of expressing a number as a fraction of 100. For example, 50% means 50 out of 100 or 0.5 as a decimal.

Now, let's look at the difference between 100 and 125. The difference is 25. To find the percentage difference, we need to divide the difference by the original number (100) and then multiply by 100 to get the percentage.

So, the percentage difference between 100 and 125 is:

(25/100) x 100 = 25%

This means that 125 is 25% more than 100. Another way to think about it is that 100 is 20% less than 125.

In summary, the percentage difference between 100 and 125 is 25%, which means that 125 is 25% more than 100.