Compare 56/15 and 21/84, Which fraction is greater?

Compare 56/15 and 21/84

1^st number: 3 11/15, 2^nd number: 21/84

56/15 is greater than 21/84

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 15 × 28 = 420,
56/15 = 56 × 28/15 × 28 = 1568/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
1568/420 > 105/420 or 56/15 > 21/84

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