Give the step-by-step reasoning process and then the final answer. There are 11 boys and 13 girls in a class. If 1 boy is added to the class, what percentage of the class are girls?
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There are a total of 11 + 1 = 12 boys in the class. Hence, there are a total of 12 boys + 13 girls = 25 students in a class. So 13 / 25 x 100% = 52% of the class are girls.
The final answer: 52.
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