Question

by selling 8 dozen pencils a shopkeeper gains the selling price of 1 dozen pencils find the gain percentage

Answer 1

let sp of 1 dozen pencil= x
then sp of 8 dozen pencil= 8x
after selling 8 dozen he gains sp of 1 dozen ie x... so the final sp = 9x
gain %= (9x-8x)/8x *100=100/8 =25/2%