Compare 21/90 and 56/42, Which fraction is greater?

Compare 21/90 and 56/42

1^st number: 21/90, 2^nd number: 1 14/42

21/90 is smaller than 56/42

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
56/42 = 56 × 15/42 × 15 = 840/630
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
147/630 < 840/630 or 21/90 < 56/42

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