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 150 and 365 is 215 (365 - 150 = 215).

Next, we need to find the average of the two numbers. The average of 150 and 365 is (150 + 365) / 2 = 257.5.

Now, we can calculate the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 150 and 365 is (215 / 257.5) x 100 = 83.5%.

This means that the second number (365) is 83.5% higher than the first number (150).