Compare 84/40 and 20/81, Which fraction is greater?

Compare 84/40 and 20/81

1^st number: 2 4/40, 2^nd number: 20/81

84/40 is greater than 20/81

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240

Next, find the equivalent fraction of both fractional numbers with denominator 3240
For the 1st fraction, since 40 × 81 = 3240,
84/40 = 84 × 81/40 × 81 = 6804/3240
Likewise, for the 2nd fraction, since 81 × 40 = 3240,
20/81 = 20 × 40/81 × 40 = 800/3240
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
6804/3240 > 800/3240 or 84/40 > 20/81

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