Question

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Answer 1

Here's your answer!!

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It is given that,

Cost price of 16 book =Selling price of 12 book.

Let the CP of one book be =₹1

So,

Cost Price of 16 book = 1×16 => ₹16

And,

Selling Price of 12 notebook = ₹16 ( since CP =SP)

So,

Selling Price of 1 notebook =

$= > \frac{16}{12} = \frac{4}{3}$

Now ,we can see that SP of 1 book is greater than CP of one book.


That is ,

=>SP > CP


Hence,
It is a gain.


We know that,

Gain =Selling Price -Cost Price


$= > \frac{4}{3} - 1$

$= > \frac{4 - 3}{3}$

$= > \frac{1}{3}$

Now,


$gain\% = \frac{gain}{cp} \times 100$

$= > \frac{ \frac{1}{3} }{1} \times 100$

$= > \frac{1}{3} \times 100$
$= > \frac{100}{3}$


$= > 33 \frac{1}{3}$


Hence,

Gain % = 33.33 % or 33 1/3%

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Hope it helps you !! :)

Answer 2

Solutions :-

Given :- Cost price of 16 notebooks is equal to the selling price 12 notebooks.

Now,

Find the LCM of 16 and 12 :-

LCM of 16 and 12 is 48

So,

Cost Price of 16 notebooks = Rs 48

Cost Price of 1 notebook = Rs 48/16 = Rs 3

Selling price of 12 notebooks = Rs 48

Selling price of 1 notebook = Rs 48/12 = Rs 4

We have,

Cost Price = Rs 3

Selling price = Rs 4

Selling price is greater than cost price.

Therefore,  Profit

Profit = selling price - cost price

= Rs ( 4 - 3) = Rs 1

Profit % = (profit × 100)/cost price %

= (1 × 100)/3 %

= 100/3 % = 33⅓ %

Hence,

Gain percent is 33⅓ %