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 285 and 195 is 90 (285 - 195 = 90).

Next, we need to find the average of the two numbers. The average of 285 and 195 is (285 + 195) / 2 = 240.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 285 and 195 is (90 / 240) x 100 = 37.5%.

Therefore, the percentage difference between 285 and 195 is 37.5%. This means that 195 is 37.5% less than 285.