Question

the s.p of 12 pens is equal to the cost of 15 pens find the gain percent

Answer 1

gain =15-12=3 sp
gain%= 3sp/12sp×100=25%
please mark it as a brainliest answer

Answer 2

Let the CP of each pen be Rs.x.

Then,

CP of 12 pens=Rs.12

SP of 12 pens=CP of 15 pnes=Rs.15

now,gain=SP-CP=Rs.(15-12)=Rs.3

gain%=gain/cp*100

         =(3/12*100)%=25%

Hence,the gain=25%.