Question $(7)$

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Directions: Click the Case Link above and use the information provided in Brook Plumbing Supply Company, Inc., Part B$,$ to answer this question:

What is the trend in Brook Plumbing's net profit margin from $20Y1$ to $20Y3?($Express your calculation as a percentage and carry to two decimal places.$)$

Net profit margin has been constant.

Net profit margin has decreased each year.

Net profit margin has increased.

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