Question

If the cost price of 12 pens is equal to the selling price of 8 pens. Find the gain percentage.

Answer 1

Answer:

50%

Step-by-step explanation:

Let CP of one pen be x

then the CP of 12 pens = 12x

similarly CP of 8 pens   = 8x

but he is selling it in 8 pens in a cost of 12x

Clearly from above statements we can tell that

CP of 8 pens is 8x but SP is 12x

Now,                  

Gain % = $\frac{SP-CP}{CP}$ × 100 %

⇒$\frac{12x - 8x}{8x}$ × 100

⇒$\frac{4x}{8x}$ × 100

⇒ 50%

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