Compare 42/21 and 30/56, Which fraction is greater?

Compare 42/21 and 30/56

1^st number: 2 0/21, 2^nd number: 30/56

42/21 is greater than 30/56

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 21 × 8 = 168,
42/21 = 42 × 8/21 × 8 = 336/168
Likewise, for the 2nd fraction, since 56 × 3 = 168,
30/56 = 30 × 3/56 × 3 = 90/168
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
336/168 > 90/168 or 42/21 > 30/56

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