John had a stock of 1000 books in his bookshop. He sold 75 on Monday, 50 on Tuesday, 64 on Wednesday, 78 on Thursday and 135 on Friday. What percentage of the books were not sold?	Choose the correct choice:
A) 59.8%
B) 23.8%
C) 66.5%
D) 34.9%
E) 43.5%
Let N be the total number of books sold. Hence   N = 75 + 50 + 64 + 78 + 135= 
<gadget id="calculator">75 + 50 + 64 + 78 + 135</gadget>
<output>402</output>
402   Let M be the books NOT sold   M= 1000 - N = 1000 - 402= 
<gadget id="calculator">1000 - 402</gadget>
<output>598</output>
598   Percentage   Books not sold / total number of books= 598/1000 = 59.8 = 59.8%   correct answer 59.8%
<result>A</result>
John had a stock of 1000 books in his bookshop. He sold 75 on Monday, 50 on Tuesday, 64 on Wednesday, 78 on Thursday and 135 on Friday. What percentage of the books were not sold?