Problem 8

$$\begin{array}{lcl} 8.\:A\:store\:buys\:a\:pound\:of\:apples\:for\:75\:cents\:and\\ then\:the\:store\:sells\:it\:for\:a\:dollar.\:What\:percent\\ of\:the\:selling\:price\:is\:the\:store's\:profit\:?\\ \\ (A)\:15\%\\ \\ (B)\:20\%\\ \\ (C)\:35\%\\ \\ (D)\:25\%\\ \\ (E)\:30\%\\ \end{array}$$