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The ratio of boys to girls in Mrs. Ronilo's math class is 3 to 1. What PERCENT of the class is girls?

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Out of every 4 students, 3 are boys and 1 is a girl.

25% are girls.

girls = X.
boys = 3x.

x/(x+3x) * 100% = x/4x * 100% = 1/4 * 100% = 25% are girls.

25%

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