2. 职称英语
  3. From 2011 to 2012, Jack’s annual salary increased by 10 percent and Arnie’s annu

From 2011 to 2012, Jack’s annual salary increased by 10 percent and Arnie’s annu

游客2024-01-12  53
问题 From 2011 to 2012, Jack’s annual salary increased by 10 percent and Arnie’s annual salary decreased by 5 percent. If their annual salaries were equal in 2012, then Amies annual salary in 2011 was what percent greater than Jack’s annual salary in 2011 ?
Give your answer to the nearest 0.1 percent.
______%
选项
答案 15.8
解析 Let k be Jack’s annual salary in 2011, and let r be Amies annual salary in 2011. Then Jack’s annual salary in 2012 was 1.1k, and Amies was 0.95r. Since their salaries in 2012 were equal to each other, you have 0.95r = 1.1k. Solving the equation for r, you get r =k. Since=1.1578..., it follows that, rounded to the nearest 0.1%, Arnie’s annual salary in 2011 was 15.8% greater than Jack’s annual salary in 2011. The correct answer is 15.8.
This explanation uses the following strategies.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
Strategy 5: Simplify an Arithmetic or Algebraic Representation
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