Question

A shopkeeper bought locks at the rate of 8 locks for rupees 34 and sold them at the rate of 12 locks for rupees 57 calculat his gain percent

Answer 1

11.7% profit

cp of 1 lock=34/8=4.25

sp of 1 lock=57/12=4.75

profit/loss=(sp-cp)/cp *100

=4.75-4.25/4.25*100

=11.7%(profit)