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 69 and 35 is 34.

Next, we need to find the average of the two numbers. The average of 69 and 35 is (69+35)/2 = 52.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 69 and 35 is (34/52) x 100 = 65.38%.

This means that the difference between 69 and 35 is 65.38% of the average of the two numbers.