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The percentage of girls started at 77% and dropped to 54% with no boys leaving. As the total number of students was 100, 54% means there are 54 girls still there. As 77 minus 54 is 23, that is how many girls left.

N=23.

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Q: A school has 77 girls and 23 boys If N girls leave the school then the percentage of girls will become exactly 54 percent Determine the value of N Assuming that no boys left the school?
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