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Because the numerators are the same, you can compare the denominators. Since 10ths are larger than 13ths, 3/10 is larger than 3/13.

When the denominators are the same, the fraction with the larger numerator is the largest. When the numerators are the same, the fraction with the smaller denominator is the largest.

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Q: How can you compare 3-10 and 3-13 without finding a common denominator?
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