Question

13. The price of sugar goes up by 30%. By what per cent should a house wife reduce her consumption so
that the expenditure does not increase?
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Answer 1

Answer:

30. is to decreased out of the increased cost of Rs130 R s 130 . Percentage decrease =30130×100=30013≈23% = 30 130 × 100 = 300 13 ≈ 23 % . Hence, the consumption of 23% of sugar should be decreased so that the expenditure on sugar remains the same.

Answer 2

Answer:

Let price of 100kg sugar be = 100rs Price goes up by 30\% , therefore new price=130rsIn 130rs quantity of sugar can be purchased =100kg In 100rs quantity of sugar can be purchased =100*100/130; =1000/13kg Difference in consumption =100/1-1000/13; =1300-1000/13; =300/13kg % of reduction I = 300/13 / 100 * 100; =23*1/13\% .