To understand the percentage difference between 6 and 7, we first need to understand what percentage difference means. Percentage difference is a way to measure the difference between two values as a percentage of one of the values. In this case, we are comparing the values of 6 and 7.

To calculate the percentage difference between 6 and 7, we first need to find the absolute difference between the two values. The absolute difference is simply the difference between the two values without considering whether they are positive or negative. In this case, the absolute difference between 6 and 7 is 1.

Next, we need to find the average of the two values. The average of 6 and 7 is (6+7)/2 = 6.5.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 6 and 7 is:

|6-7| / (6+7)/2 * 100

= 1 / 6.5 * 100

= 15.38%

Therefore, the percentage difference between 6 and 7 is 15.38%. This means that 7 is 15.38% greater than 6.