Discuss Forum
1. From 2004 to 2005. the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006 ?
- A. 80%
- B. 80%
- C. 80%
- D. 80%
Answer: Option D
Explanation:
let, 100 copies were sold in 2004
∴copies sold in 2005 = 100 - 80 = 20
copies sold in 2006 = 100
so, required increase = (100 - 20)/20 × 100 = 400% (ans)
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