The selling price of an article is four times of its cost price. If the selling price is reduced by ₹300, then the profit becomes 250%. What is the cost price of the article?

₹600

Selling price of an article =  four times of its cost price

SP : CP = 4 : 1

Let the cost price = 1x

then the selling price = 4x

If the selling price reduced by 300 then the profit will become 350%

According to the question,

\(\frac{4x - 300}{x}\) = \(\frac{7}{2}\)

8x - 600 = 7x

x = CP = 600