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 190 and 125 is 65.

Next, we need to find the average of the two numbers. The average of 190 and 125 is (190+125)/2 = 157.5.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 190 and 125 is (65/157.5) x 100 = 41.27%.

Therefore, the percentage difference between 190 and 125 is 41.27%. This means that the difference between the two numbers is 41.27% of their average value.