Question

By selling a dozen pencil at cost at cost of $30 the shopkeeper grains $ 10. His percentage of profit was

Answer 1

he sells 12 pencils at 10$ profit=30$
cp=30$-10$=20$
so profit%=10/20*100
=50%

Answer 2

1 dozen pencils(12 pencil) = 30$
profit % = 10/30*100 = 33 % approx