Question

the cost price of 16 books is equal to the selling price of 12 books find the percentage gain​

Answer 1

Step-by-step explanation:

CP of 16 books = SP of 12 books

CP/SP=12/16

CP:SP=3:4

So profit Percentage= 100(4-3)/3 %

=100/3%

= 33.33%.

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Answer 2

Answer:

Let the cost price of one book be Rs.x

Cost price of 16 books be 16x

And the selling price of one book be Rs.y

Selling price of 12 books be 12y

According to question

$12y = 16x \\ y = \frac{4}{3x}$

PROFIT= S.P-C.P

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

$profit \: percent = \frac{1}{3} x \div x \times 100 = 33.33\%$