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 133 is 17.

Next, we need to find the average of the two numbers. The average of 150 and 133 is (150+133)/2 = 141.5.

Now, we can find the percentage difference by dividing the absolute difference by the average and multiplying by 100. So, the percentage difference between 150 and 133 is (17/141.5) x 100 = 12.02%.

Therefore, the percentage difference between 150 and 133 is 12.02%. This means that 133 is 12.02% less than 150.