Question

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

Answer 1

$\blue{Answer}$

Let the C.P be 'x' and the S.P be 'y'

then 15x = 20y

As from

$(1)x > y = > c.p > s.p$

hence, loss

=>

$loss = \frac{c.p - s.p}{c.p} \times 100 \frac{x - y}{x} \times 100$

=>

$( 1 - \frac{y}{x} )100 = (1 - \frac{15}{20} ) \\ 100 ....(from \: (1)) \\ = 25\% \: loss$

Hope it helps u