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Question

A number increases from 30 to 40 and then decreases from 40 to 30. Compare the percent of increase from 30 to 40 and that of the decrease from 40 to 30.

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Solution

A number increases from 30 to 40 that is it increases by 10
the original number was 30.
Hence the percentage of increase =1030×100=33.3333%33%
When the number decreases ,it decreases by 10 only but the original number was 40
Hence the percentage of increase =1040×100=25%

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