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?
To make 200 fries he will need 200 / 25 fries per potato = <<200/25=8>>8 potatoes.
He has 15 potatoes - 8 potatoes = <<15-8=7>>7 leftover potatoes.
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