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Question

How to solve 275825187×2147, Its percentage is required.


Solution


For approximation,
275825187×2147=275800200×2100×100=27582×21=137921=140021=2003 (numerator should be increased by a value of 6, since numerator is first decreased by 25, then increased by 21 after some simplification; and denominator 187 is increased by 13, and 2147 decreased by 47; so approximately by 6, the numerator should be increased) Answer should be approximately 2063=68.67%.
 

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