Problem:
Last year a bicycle cost and a cycling helmet cost . This year the cost of the bicycle increased by , and the cost of the helmet increased by . The percent increase in the combined cost of the bicycle and the helmet is
Answer Choices:
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Solution:
Last year the bicycle and helmet cost . This year the cost of the bicycle increased , while the cost of the helmet increased . Thus it costs more for the bicycle and helmet this year. This is an increase of .