Question

After giving a discount of 20percent, a book is sold for Rs. 1200. Find the marked price of the book.​

Answer 1

Let the Marked Price = Rs. X

Discount = 20%

Selling Price = Rs 1120

So 20 % of Marked price subtracted from Marked price = Selling Price

=> X - 20% of X = 1120

=> X - 20 / 100 * X = 1120

=> X - X / 5 = 1120

Taking LCM on the Left side we get,

=> 5X - X / 5 = 1120

=> 4X / 5 = 1120

=> 4X = 1120 * 5

=> 4X = 5600

=> X = 5600 / 4 = 1400

Hence the marked or the original cost price of the object is Rs. 1400.

Answer 2

Answer:

Let the Marked Price = Rs. X

Discount = 20%

Selling Price = Rs 1120

So 20 % of Marked price subtracted from Marked price = Selling Price

=> X - 20% of X = 1120

=> X - 20 / 100 * X = 1120

=> X - X / 5 = 1120

Taking LCM on the Left side we get,

=> 5X - X / 5 = 1120

=> 4X / 5 = 1120

=> 4X = 1120 * 5

=> 4X = 5600

=> X = 5600 / 4 = 1400

Hence the marked or the original cost price of the object is Rs. 1400.