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skillszone | 13:32 Tue 30th May 2006 | Quizzes & Puzzles
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<FONT color=#ff0000>X</FONT> is now being sold at $ 20 a kg. During last month its rate was $ 16 per kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed?
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suppose they used 10kg

at $16 per kilo costs 16 x10 = 160

to keep costs unchanged they need to reduce consumption to
160 / 20 = 8kg

a reduction of 20%

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