Question

Madhuri went to a supermarket. The price changes are as follows. The price of rice reduced by $5\%$, jam and fruits reduced by $8\%$ and oil and dal increased by $10\%$. Help Madhuri to find the changed prices in the given table.

Item	Original price/kg	Changed price
Rice	$Rs.30$
Jam	$Rs.100$
Apples	$Rs.280$
Oil	$Rs.120$
Dal	$Rs.80$

Answer 1

Changed Price = Original Price + (% Inc or Dec) $\times$ Original Price

i) Rice

$C.P=30+(-\frac{5}{100})\times 30=30-0.5=Rs.29.5$

ii) Jam

$C.P=100+(-\frac{8}{100})\times 100=100-8=Rs.92$

iii) Apples

$C.P=280+(-\frac{8}{100})\times 280=280-22.4=Rs.257.6$

iv) Oil

$C.P=120+\left(\frac{10}{100}\right)\times 120=Rs.132$

v) Dal

$C.P=80+\left(\frac{10}{100}\right)\times 80=Rs.88$