Question

by what percent a person must reduce the consumption of rice not to increase his expenditure if the price of rice is increased by 20 percent solve it

Answer 1

Hi there!
Here's the answered :


• If price of Commodity increases by 'p%', then the reduction in consumption so as not to increase the expenditure is R%

R= [(100p)/(100+p)]%

Now,
Given
Commidity= Rice
p= 20%
R= ?

R= [(100×20)/(100+20)]%
= [2000/120]%
= (50/3)%
=~ 16.67%

•°• Required reduction in rice consumption is 16.67% so as not to increase the expenditure.

:)
Hope it helps

Answer 2

Answer: A person must reduce the consumption b y 16.67%.

Step-by-step explanation:

Since we have given that

if the price of rice is increased by 20 percent.

Here, r = 20%

We need to find the percent that a person must reduce the consumption of rice not to increase his expenditure.

So, it becomes,

$\dfrac{r}{100+r}\times 100\\\\=\dfrac{20}{120}\times 100\\\\=\dfrac{1}{6}\times 100\\\\=16.67\%$

Hence, a person must reduce the consumption b y 16.67%.