Compare 12/5 and 1/21, Which fraction is greater?

Compare 12/5 and 1/21

1^st number: 2 2/5, 2^nd number: 1/21

12/5 is greater than 1/21

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 5 × 21 = 105,
12/5 = 12 × 21/5 × 21 = 252/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
252/105 > 5/105 or 12/5 > 1/21

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