Compare 50/21 and 30/40, Which fraction is greater?

Compare 50/21 and 30/40

1^st number: 2 8/21, 2^nd number: 30/40

50/21 is greater than 30/40

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

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 21 × 40 = 840,
50/21 = 50 × 40/21 × 40 = 2000/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
30/40 = 30 × 21/40 × 21 = 630/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
2000/840 > 630/840 or 50/21 > 30/40

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