John had a stock of 1000 books in his bookshop. He sold 20 on Monday, 120 on Tuesday, 200 on Wednesday,250 on Thursday and 300 on Friday. What percentage of the books were not sold? Select the correct option:	A) 68%	B) 74%	C) 76%	D) 62%	E) 89%
Let N be the total number of books sold. Hence   N = 20 + 120 + 200 + 250+ 300= 
<gadget id="calculator">20 + 120 + 200 + 250+ 300</gadget>
<output>890</output>
890   Let M be the books NOT sold   M= 1000 - N = 1200 - 890 = 798   Percentage   Books not sold / total number of books = 890/1000= 
<gadget id="calculator">890/1000</gadget>
<output>89/100 = around 0.89</output>
0.89= 89%   correct answer 89%
<result>E</result>
John had a stock of 1000 books in his bookshop. He sold 20 on Monday, 120 on Tuesday, 200 on Wednesday,250 on Thursday and 300 on Friday. What percentage of the books were not sold?