# Ex.8.3 Q8 Compairing Quantities - NCERT Maths Class 7

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## Question

Amina buys a book for $$\rm Rs \,275$$ and sells it at a loss of $$15\%.$$ How much does she sell it for?

Video Solution
Comparing Quantities
Ex 8.3 | Question 8

## Text Solution

What is Known?

The price at which Amina buys a book $$\rm(Rs\, 275)$$ and the loss percent $$(15\%)$$ she makes after selling it.

What is Unknown?

The price at which she sells the book.

Reasoning:

Loss $$=$$ \begin{align}\frac{{\text{Loss}\% }}{{100}} \times \end{align} Cost Price
Selling Price $$=$$ Cost price $$-$$ Loss

Steps:

Cost of book $$= 275$$ and loss $$= 15\%$$ of Cost price

Total loss

$= \frac{{15}}{{100\;}} \times 275 = {\text{Rs }}41.25$

So,

Selling Price $$=$$ Cost price $$-$$ loss

\begin{align} &=\text{ }275-41.25 \\& =\text{Rs }233.75\end{align}

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