Compare 21/12 and 21/18, Which fraction is greater?

Compare 21/12 and 21/18

1^st number: 1 9/12, 2^nd number: 1 3/18

21/12 is greater than 21/18

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 12 × 3 = 36,
21/12 = 21 × 3/12 × 3 = 63/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
63/36 > 42/36 or 21/12 > 21/18

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