Compare 21/54 and 5/80, Which fraction is greater?

Compare 21/54 and 5/80

21/54 is greater than 5/80

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160

Next, find the equivalent fraction of both fractional numbers with denominator 2160
For the 1st fraction, since 54 × 40 = 2160,
21/54 = 21 × 40/54 × 40 = 840/2160
Likewise, for the 2nd fraction, since 80 × 27 = 2160,
5/80 = 5 × 27/80 × 27 = 135/2160
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
840/2160 > 135/2160 or 21/54 > 5/80

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