The percentage difference between 100 and 95 can be calculated by first finding the absolute difference between the two numbers, which is 5. Then, we divide this absolute difference by the original number (100) and multiply by 100 to get the percentage difference.

So, the calculation would be:

Absolute difference = |100 - 95| = 5

Percentage difference = (Absolute difference / Original number) x 100 = (5 / 100) x 100 = 5%

Therefore, the percentage difference between 100 and 95 is 5%. This means that 95 is 5% less than 100.