Answer:
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!