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 35 and 105 is 70 (105 - 35 = 70).

Next, we need to find the average of the two numbers. The average of 35 and 105 is (35 + 105) / 2 = 70.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 35 and 105 is (70 / 70) x 100 = 100%.

This means that the second number (105) is 100% greater than the first number (35). Alternatively, we could say that the first number is 100% less than the second number.