Question

the petrol prices were hiked by 3% and then they were rolled back by 2%. find the net increase or decrease per cent in the prices​

Answer 1

Answer:

Answer: A housewife should reduce the consumption by 16.67%.

Step-by-step explanation:

Since we have given that

Price of tea is increase by = 20%

Let the original price of tea be Rs. 100.

Increased by

\begin{lgathered}\frac{20}{100}\times 100\\\\=Rs.20\end{lgathered}

100

20

×100

=Rs.20

New price becomes

100+20=Rs.120100+20=Rs.120

To a housewife needs to reduce the consumption to tea so as not to increase the expenditure on tea.

So, there is formula for this:

\frac{R}{100+R}\times 100

100+R

R

×100

Here, R denotes the rate of change i.e. 20%.

\begin{lgathered}=\frac{20}{120}\times 100\\\\=\frac{1}{6}\times 100\\\\=16.67\%\end{lgathered}

=

120

20

×100

=

6

1

×100

=16.67%

Hence, a housewife should reduce the consumption by 16.67%.