###Human: 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?, ### Assistant: To make 200 fries he will need 200 / 25 fries per potato = 8 potatoes.
He has 15 potatoes - 8 potatoes = 7 leftover potatoes. 
 So the answer is :  7