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# The cost of 16 pens is equal to the selling price of 12 pens. Find the gain or loss percent.

**Given :**

The cost price of 16 pens $=$ Seling price of 12 pens.

**To do :**

We have to find the gain or loss percent.

**Solution :**

Let the cost price of a pen $= ₹1$.

The cost price of 16 pens $= 1 \times 16 = ₹16$

So, the cost price of 12 pens $= 1 \times 12 = ₹12$

It is given that, selling price of 12 pens $=$ cost price of 16 pens.

Therefore, the selling price of 12 pens $= ₹16$

Profit $=$ Selling price of 12 pens $-$ Cost price of 12 pens

$= 16-12 = ₹4$

Profit % $= \frac{Profit}{Cost price of 12 pens} \times 100$

$= \frac{4}{12} \times 100$

$=\frac{1}{3} \times 100 = 33 \frac{1}{3}$%.

**Therefore, the profit % is $33 \frac{1}{3}$%.**

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