Question 59

Theprice ofpetrol is increased by 28%. A person wants to increase his expenditure by 22% only. By approximately what percent should he decrease his consumption?

Solution

Expenditure = Price $$\times$$ Consumption

Initially , let e be the expenditure , p be price and c be the consumption.

e = p $$\times$$ c

Now , p is increased by 28% and expenditure can only be increased by 22 %. Let c' be the new consumption.

1.22 e =1.28 p $$\times$$ c'

c' = 95.31%

So , consumption should be decreased by 4.68%.

So , the answer would be option b)4.7%.

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