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 62 and 71 is 9.

Next, we need to find the average of the two numbers. The average of 62 and 71 is (62+71)/2 = 66.5.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 62 and 71 is (9/66.5) x 100 = 13.53%.

Therefore, the percentage difference between 62 and 71 is 13.53%. This means that 71 is 13.53% greater than 62.