When the first Harry Potter movie came out, "The Sorcerer's Stone," a local book store marked all the Harry Potter books up by 12.5%. If "The Sorcerer's Stone" paperback cost $7.37 before the movie came out, how much did it cost after the mark up?

Question

My answer is 12.5% turned into a decimal which is .125 times $7.37 which is 0.92125 which makes no sense at all. What do i do ? Do i add 0.92 plus $7.37 ?? If someone could help me i would really appreciate it

Answer 1

you need to add the tax. So the final cost is

1.125 * 7.37 = 8.29

What you did is correct. you add the 0.92 and 7.37, to get 8.29

My way gets the same answer, but avoids the step of explicitly calculating the tax.

1.125 = 1 + 0.125

Answer 2

Ohh ok Thank you! I

Answer 3

how would this go if the 12.5% was a 40.5%