Question

a shopkeeper marks his goods 30percent above the cost price and gives discount 15percent in the marked price. what gain percent does he make?

Answer 1

The shopkeeper earns a profit of 15%. because it is 30% above above C.P and it is the m.p
again he is giving discount 15%.so,30-15=15

Answer 2

he will gain a profit of 10% 
example - cost price = rs 100
he marked it as rs 130
he gave discount of 15% = 130 - [130 *15%] = 19.5
so now selling price vl be 110.5 
his profit is of rs 10.5 that is approximately 10%