He needs 400 calories worth of peanut butter because 500 - 100 = <<500-100=400>>400

He needs 2 servings of peanut butter because 400 / 200 = <<400/200=2>>2

# Answer

2
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2
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?
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