To find the percentage difference between two numbers, we first need to calculate the absolute difference between them. In this case, the absolute difference between 125 and 145 is 20.

Next, we need to find the average of the two numbers. The average of 125 and 145 is (125+145)/2 = 135.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 125 and 145 is (20/135) x 100 = 14.81%.

Therefore, the percentage difference between 125 and 145 is 14.81%. This means that 145 is 14.81% more than 125.