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Write the prime factorization of each denominator.

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Write the prime factors of each number in the exponential form.

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Multiply the highest power of each factor in either number.

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Least Common Denominator of 42 and 21 is 126. $\"\"$

Rewrite the equivalent fractions using the LCD.

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Compare the numerators. Numerators are not same and 40> 33.

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