Compare 63/15 and 81/21, Which fraction is greater?

Compare 63/15 and 81/21

1^st number: 4 3/15, 2^nd number: 3 18/21

63/15 is greater than 81/21

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
63/15 = 63 × 7/15 × 7 = 441/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
81/21 = 81 × 5/21 × 5 = 405/105
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
441/105 > 405/105 or 63/15 > 81/21

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