Patrick purchased 90 pencils and sold them at a loss equal to the selling price of 40 pencils. The cost of 90 pencils is how many times the selling price of 90 pencils?
Choose the correct option
A) 0.75  B) 0.8  C) 1  D) 1.2  E) 1.44
Say the cost price of 90 pencils was $90 ($1 per pencil) and the selling price of 1 pencil was p.   Selling at a loss: 90 - 90p = 40p --&gt; p = 9/13.   (cost price)/(selling price) = 1/(9/13) = 13/9 = 1.44.   Answer: 1.44.
<result>E</result>
Patrick purchased 90 pencils and sold them at a loss equal to the selling price of 40 pencils. The cost of 90 pencils is how many times the selling price of 90 pencils?