Question

The cost price of 16 note books is equal to the selling price of 12 note books. Find the gain percent.

Answer 1

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

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

Profit is given by $SP-CP=y-x\frac{4}{3}x-x=\frac{1}{3}x$

Profit Percent is $\frac{\frac{1}{3}x}{x}\times 100=33.33\%$