What was the original price?

Question

Jane paid $40 for an item after she recieved a 20% discount. Jane's friend says this means that original price of the item was $48. How do you think Jane's friend arrived at this amount?

Answer 1

P = original price

 

20% discount means Jane paid (100 - 20)% = 80% of the original price, which is 0.80P

 

$40 = 0.80P

 

P = $40/0.80 = $50

 

Jane's friend is wrong.