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 225 and 160 is 65.

Next, we need to find the average of the two numbers. The average of 225 and 160 is (225+160)/2 = 192.5.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 225 and 160 is (65/192.5) x 100 = 33.77%.

This means that 33.77% is the percentage by which 225 differs from 160. In other words, if we increase 160 by 33.77%, we will get 225. Similarly, if we decrease 225 by 33.77%, we will get 160.