Question

If the selling price of 10 pens is equal to the cost price of 14 pens find gain percentage

Answer 1

let the cp of each pen =Rs. x

so the cost  price of 10 pen = rs.10

sp of 10 pen= cp of 14 pens= rs.14

profit = sp- cp = 14 - 10 =Rs 4

profit % = profit/ cp *100

p% = 4 / 14 *100%

=200/7 = 28.57%