Compare 21/14 and 4/81, Which fraction is greater?

Compare 21/14 and 4/81

1^st number: 1 7/14, 2^nd number: 4/81

21/14 is greater than 4/81

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 81 is 1134

Next, find the equivalent fraction of both fractional numbers with denominator 1134
For the 1st fraction, since 14 × 81 = 1134,
21/14 = 21 × 81/14 × 81 = 1701/1134
Likewise, for the 2nd fraction, since 81 × 14 = 1134,
4/81 = 4 × 14/81 × 14 = 56/1134
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
1701/1134 > 56/1134 or 21/14 > 4/81

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