Compare 90/40 and 12/42, Which fraction is greater?

Compare 90/40 and 12/42

1^st number: 2 10/40, 2^nd number: 12/42

90/40 is greater than 12/42

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
90/40 = 90 × 21/40 × 21 = 1890/840
Likewise, for the 2nd fraction, since 42 × 20 = 840,
12/42 = 12 × 20/42 × 20 = 240/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
1890/840 > 240/840 or 90/40 > 12/42

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