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1. In a book store, the sales of a book decreased by 80% from 2007 to 2008. If the sales in 2009 were the same as in 2007, would be the percentage increase in sales from 2008 to 2009?

  • A. 80%
  • B. 80%
  • C. 80%
  • D. 80%

Answer: Option E

Explanation:

let, in 2007 was = 100

,, 2008 ,, = 20

,, 2009 ,, = 100

increase percentage = ( 100 - 20/20)

= 400% (answer)


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