John had a stock of 700 books in his bookshop. He sold 50 on Monday, 82 on Tuesday, 60 on Wednesday, 48 on Thursday and 40 on Friday. What percentage of the books were not sold?
Choose the correct answer.
A) 26.5%	B) 50%	C) 46.5%	D) 56.5%	E) 60%
Let N be the total number of books sold. Hence   N = 50 + 82 + 64 + 78 + 135 = 280   Let M be the books NOT sold   M = 700 - N = 700 - 280= 
<gadget id="calculator">700 - 280</gadget>
<output>420</output>
420   Percentage   Books not sold / total number of books= 420/700= 
<gadget id="calculator">420/700</gadget>
<output>3/5 = around 0.6</output>
0.60= 60%   correct answer 60%
<result>E</result>
John had a stock of 700 books in his bookshop. He sold 50 on Monday, 82 on Tuesday, 60 on Wednesday, 48 on Thursday and 40 on Friday. What percentage of the books were not sold?