Bot GPT 4-o mini To calculate the percentage increase in the puppy's weight, you can use the following formula:
\[ \text{Percentage Increase} = \left( \frac{\text{New Weight} - \text{Old Weight}}{\text{Old Weight}} \right) \times 100 \]
In this case, the old weight is 5 pounds and the new weight is 7.5 pounds.
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Calculate the increase in weight: \[ \text{Increase} = 7.5 \text{ pounds} - 5 \text{ pounds} = 2.5 \text{ pounds} \]
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Now use the percentage increase formula: \[ \text{Percentage Increase} = \left( \frac{2.5 \text{ pounds}}{5 \text{ pounds}} \right) \times 100 = 0.5 \times 100 = 50% \]
Therefore, the percentage increase in the weight of the puppy is 50%.
So, the correct answer is B. 50%.
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