If (x + 1/x ) = 16, find the value of x² + 1/x²

The percentage decrease of the shirt's price is 15%.

Step-by-step explanation:

1) divide 36.15 by 30.75

30.75/36.15=0.85

2) Multiply 0.85 by 100 to find the percentage between the original and sale costs of the shirt

0.85(100)= 85%

3) Find the difference between 85% and 100% to find the percentage difference

100%-85%= 15%.

Therefore, the answer is 15%.

Hope this helps!