The marked price of the notebook is y ₹ , Discount given is 20% on the MP. Find the selling price of notebook.

Given :

Marked price of the notebook is y ₹ , 

Discount $= 20%$ 

To find :

We have to find the selling price.

Solution :

Marked price $= y$

Discount $= 20% of y = \frac{20}{100} \times y = 0.2y$ 

$Selling price =  Marked price - Discount $

$y-0.2y = y(1-0.2)$

            $= y(1.0-0.2)$

            $= y(0.8)$

            $=0.8y$.

Selling price of note book is 0.8y