The total cost of buying bread and ham was $50+$150 = $<<50+150=200>>200

Together with the cake, Tina paid $200+$200 = $<<200+200=400>>400 for the items

Since the total percentage for all the items is 100%, the cost of ham and bread is $200/$400 * 100% = <<200/400*100=50>>50% of the total cost of items.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tina buys a loaf of bread for $50, 2oz of ham for $150, and a cake for $200. What percent of the cost is the ham and bread?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
50
Tina buys a loaf of bread for $50, 2oz of ham for $150, and a cake for $200. What percent of the cost is the ham and bread?
train