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\frac{7}{21}+\frac{18}{21}=1
Least common multiple of 3 and 7 is 21. Convert \frac{1}{3} and \frac{6}{7} to fractions with denominator 21.
\frac{7+18}{21}=1
Since \frac{7}{21} and \frac{18}{21} have the same denominator, add them by adding their numerators.
\frac{25}{21}=1
Add 7 and 18 to get 25.
\frac{25}{21}=\frac{21}{21}
Convert 1 to fraction \frac{21}{21}.
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Compare \frac{25}{21} and \frac{21}{21}.
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