A boy gives 15 percent of a pie to his mother, 10 percent to his father and 25 percent to his sister. What fraction of the pie is leftover?  Choices
A) 4/5	B) 3/5	C) 1/2	D) 1/5	E) 1/10
100%-(15%+10%+25%)=50% of the pie remains --&gt; 50% 100 -(15 +10 +25 )= 
<gadget id="calculator">100 -(15 +10 +25 )</gadget>
<output>50</output>
50% of the pie remains --&gt; 50%= 20/100 = 1/5.   Answer: 1/2.
<result>C</result>
A boy gives 15 percent of a pie to his mother, 10 percent to his father and 25 percent to his sister. What fraction of the pie is leftover?