Question

The price of a math book is 50$ but you only have 35$ if you get a discount of 20% how much money do you need?

Answer 1

Price of the book = $50

20% discount = 0.2 x 50 = $10

After discount, the price of the book is

$50 - $10 = $40

I have $35, so I need

$40 - $35 = $5 more

Answer: I need to borrow $5 from a friend.