Compare 45/40 and 48/21, Which fraction is greater?

Compare 45/40 and 48/21

1^st number: 1 5/40, 2^nd number: 2 6/21

45/40 is smaller than 48/21

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,
45/40 = 45 × 21/40 × 21 = 945/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
48/21 = 48 × 40/21 × 40 = 1920/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
945/840 < 1920/840 or 45/40 < 48/21

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