Which of the following is the correct "Percent of Change Formula"? 
选项为:A:$\frac{new-original}{new}\times 100\textbackslash\%$  B:$\frac{original-new}{new}\times 100\textbackslash\%$  C:$\frac{new-original}{original}\times 100\textbackslash\%$  D:$\frac{original-new}{original}\times 100\textbackslash\%$  请回答其中一个选项.