Compare 1/40 and 63/21, Which fraction is greater?

Compare 1/40 and 63/21

1^st number: 1/40, 2^nd number: 3 0/21

1/40 is smaller than 63/21

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
1/40 = 1 × 21/40 × 21 = 21/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
63/21 = 63 × 40/21 × 40 = 2520/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
21/840 < 2520/840 or 1/40 < 63/21

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