Page 153 - Maths Class 05

In case, we know the value of the profit %, loss % and cost price, we can calculate the
profit / loss amount by modifying the above formulae. See the following formulae :

Profit % × Cost Price
Profit =
100

Loss % × Cost Price
Loss =
100

Example : Find the selling price of an item if its cost price is ` 5000 and the profit
per cent is 15%.

Solution : Selling Price = Cost Price + Profit

Profit % × C.P.
We have, Profit =
100

15 × 5000
= = ` 750
100

So, the selling price = ` 5000 + ` 750

= ` 5750

Example : A shopkeeper is in a loss of 10% on the cost price of ` 6750. Find the

selling price.

Solution : Selling Price = Cost Price – Loss

Loss % × C.P.
We have, Loss =
100

10 × 6750
=
100

= ` 675

So, the selling price = ` 6750 – ` 675 = ` 6075

Practice - 9.2
Practice - 9.2
Practice - 9.2
Practice - 9.2
1. Kiara bought 50 pens for ` 100. She then sold each pen for ` 2.50. Find the profit or loss
percent.

2. Mohit rented a house for ` 49000. He spent ` 6000 to repair and ` 5000 for air-
conditioning. If he had rented the house ` 58000, find the gain or loss percentage in this
transaction.

Mathematics-5 153