Lizzy: A chef needs to make french fries. He can get 25 fries out of 1 potato. He has 15 potatoes and he needs 200 fries. How many potatoes will he have leftover?.
Me: Hmmm, let me think. I think this is the detailed solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
To make 200 fries he will need 200 / 25 fries per potato = 8 potatoes. He has 15 potatoes - 8 potatoes = 7 leftover potatoes. Final answer: 7.