Question

if jane paid 40 dollars for an item after she recieved a 20% dicount. Janes friend says the original price of the item was 48 dollars. How do you think Janes friend arrived at this amount. Is her friend correct why or why not.

Answer 1

I think Jane's friend said the original price was $48 since 20% of 40 is 8. Then he/she added 8 to 40 to get 48.

Jane's friend is incorrect.

Jane paid 80% of the original price, which is 0.8 in decimal form. We can write an equation to help us find the original price (where p is the original price)

0.8p=40
----- ----
0.8 0.8
p=50

The original price was $50

Answer 2

she is wrong because the answer would be would be 50 because 40 dollars = 80% of original price. If you were to divide by both sides by 4. it would be 10 dollars= 20% you then times both sides by 5 and it would equal to 50 dollars=100%