Compare 28/40 and 84/63, Which fraction is greater?

Compare 28/40 and 84/63

1^st number: 28/40, 2^nd number: 1 21/63

28/40 is smaller than 84/63

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 40 × 63 = 2520,
28/40 = 28 × 63/40 × 63 = 1764/2520
Likewise, for the 2nd fraction, since 63 × 40 = 2520,
84/63 = 84 × 40/63 × 40 = 3360/2520
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
1764/2520 < 3360/2520 or 28/40 < 84/63

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