Question

if the cost price of 15 pens is equal to the selling price of 20 pens, then the pens loss percent is ?​

Answer 1

Answer:

20-5=5

So,5/20x100=25%

Answer 2

25%

Answer

if the cost price of 15 pens is equal to the selling price of 20 pens,

Let the cost price of each one be ₹x and the selling price of each pen is y.

Cost price of 15 pen = 15 × x = 15x

Selling price of 20 pen = 20 × y = 20y

As per statement :

15x = 20y

y = 15x/20

y = 3/4×

y = 0.75x

Loss percentage = (Cost price - sale price)/Cost price ×100

Loss % = (x - 0.75x)/x ×100

Loss % = 0.25x/x × 100

Loss % = 0.25 × 100

Loss % = 25%