Toby is making toast and adding peanut butter to it. He wants to make sure he has 500 calories for breakfast. A piece of bread has 100 calories. A serving of peanut butter has 200 calories. If he has one piece of bread, how many servings of peanut butter should he add? Let's think first. Chain of thought:
He needs 400 calories worth of peanut butter because 500 - 100 = 400. He needs 2 servings of peanut butter because 400 / 200 = 2.
Therefore, the answer is 2.