Question

If the selling price of 10 pencils is equal to the cost price of 12 pencils then what is gain percentage

Answer 1

SP of 10 pencils=CP of 12 pencil

Let the SP of 10 pencil=Re1
// // // // 1 // =1/10
// // CP// 12 // =Re1
// // // // 1 // =1/12
G=SP-CP
=1/10-1/12
=2/120
=1/60
G%=1×12×100/60
=20%