2. 外语
  3. The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately

The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately

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问题
The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately
选项 A、44%
B、36%
C、34%
D、32%
E、27%
答案A
解析 The correct answer is A. According to the graphs, from 1990 to 2000, the average number of production hours per widget decreased from 9 to 5. To calculate the percent decrease, divide the difference between the starting value and ending value(9-5)by the starting value: 4/9 = 0.44 , which is equivalent to 44%.
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