Question

. the cost price of 12 pens is equal to the selling price of 15 pens, find the gain or loss per cent. ​

Answer 1

Answer:

25%

Given: Selling price of 12 pens is equal to the cost price of 15 pens. To find: Here we have to find the gain percentage. So, the answer is 25%.

Answer 2

Answer:

25 %

Step-by-step explanation:

The selling price of 12 pens is equal to the cost price of

Given: Selling price of 12 pens is equal to the cost price of 15 pens.

To find: Here we have to find the gain percentage.

Solution:

Let the cost price of 15 pens = a

So,

Selling price of 12 pens = a

Selling price of 1 pen = a12

Selling price of 15 pens = 15a12

Now,

Profit = SP of 15 pens − CP of 15 pens

Profit = 15a12 − a

Profit = 15a − 12a12

Profit = 3a12

Profit = a4

Therefore profit % is as below,

Profit % = ProfitCP × 100  %

Profit % = a4a × 100  %

Profit % = 14 × 100  %

Profit % = 25 %

So, the answer is 25%.

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