Question

If the price of petrol be raised by
12.5%, find by what percentage
should a consumer decrease the
consumption of petrol so that
there is no change in his
monthly expenditure on petrol ?​

Answer 1

Answer:

= 11.11 % ans

Step-by-step explanation:

we use formula $\frac{R.100}{100+R}$

from question we have R = 12.5%

so the percentage decrease

= $\frac{(12.5).100}{100+12.5}$

=$\frac{1250}{112.5}$

=$\frac{12500}{1125}$

=$\frac{500}{45}$

=$\frac{100}{9}$

= 11.11 % ans

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