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Based on the graph, what is the percentage change in the num

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Based on the graph, what is the percentage change in the num [#permalink] New post 23 Jan 2018, 15:06
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100% (00:29) correct 0% (00:00) wrong based on 10 sessions


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Based on the graph, what is the percentage change in the number of teachers from 1970 to 1990?

18%

20%

27%

36%

13%

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[Reveal] Spoiler: OA

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Re: Based on the graph, what is the percentage change in the num [#permalink] New post 24 Jan 2018, 03:23
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((750-550)/550)*100
36%
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Re: Based on the graph, what is the percentage change in the num [#permalink] New post 09 Sep 2018, 20:37
Teachers in 1970- 550
Teachers in 1990- 750

% change= (200/550)*100=36.3636... which is ~36%, hence D.
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Based on the graph, what is the percentage change in the num

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