Question

The cost price of 12 pens is equal to the selling price of 15 pens. The loss percent is

Answer 1

cp of 12 = sp of 15

i.e..,

cp of 4 =sp of 5

cp =5/4 of sp

loss percent =(cp-sp/cp)×100

=(5-4/4)÷ (5/4)×100

=(4/20)×100

=20%

hope it helps you if any doubt ask