# After a mark-up of #40%# was added to an item a boy sells it for #Rs.35#. What was his cost price and how much was his mark-up?

##### 1 Answer

Dec 12, 2016

The cost price is Rs.25 and the markup is Rs.10.

#### Explanation:

The important thing to note here is that you cannot just find 40% of Rs.35 and subtract it.

The boy's cost price represents 100%, onto which 40% is added to give Rs.35.

Therefore Rs.35 represents

**Using
direct proportion:**

**Make an equation** Let the cost price be